阅读说明：本技术 一种节能玻璃的制备方法 (Preparation method of energy-saving glass ) 是由 杨光 胡大明 杨传范 王昊琛 祁云航 何晓燕 于 2021-02-09 设计创作，主要内容包括：本发明公开了一种节能玻璃的制备方法,按重量百分比记,包括以下组分：氯化亚铁(FeCl-2)0％～5％、铁粉(Fe)0％～5％、氯化铵或硫酸铵(NH-4Cl或(NH-4)-2SO-4)0％～10％、碳酸钠(Na-2CO-3)10％～35％、二氧化硅(SiO-2)40％～70％、碳酸钙(CaCO-3)5％～25％。本发明提供的节能玻璃屏蔽近红外光同时保持高可见透过率,相比同类型产品生产原料廉价易得,生产工艺大为简化。(The invention discloses a preparation method of energy-saving glass, which comprises the following components in percentage by weight: ferrous chloride (FeCl) 2 ) 0-5%, iron powder (Fe) 0-5%, ammonium chloride or ammonium sulfate (NH) 4 Cl or (NH) 4 ) 2 SO 4 )0 to 10 percent of sodium carbonate (Na) 2 CO 3 ) 10% -35% of silicon dioxide (SiO) 2 ) 40-70% of calcium carbonate (CaCO) 3 )5 to 25 percent. The energy-saving glass provided by the invention shields near infrared light and keeps high visible transmittance, compared with the same type of products, the energy-saving glass has the advantages that the production raw materials are cheap and easy to obtain, and the production process is greatly simplified.)

1. The preparation method of the energy-saving glass is characterized by comprising the following steps: sodium carbonate, silicon dioxide, calcium carbonate, ferrous chloride, iron powder and ammonium chloride or ammonium sulfate as ammonium salt additives are taken as raw materials, wherein the addition amount of the ferrous chloride and the iron powder as iron source materials is not 0 at the same time; firstly, in a non-protective atmosphere furnace, mixing molten sodium carbonate, silicon dioxide and a part of calcium carbonate as main materials to form molten glass 1, taking out the molten glass 1, quenching, forming and crushing to obtain cullet; then mixing the cullet, ferrous chloride, iron powder, ammonium chloride or ammonium sulfate as an ammonium salt additive and the other part of calcium carbonate, and then placing the mixture in a high-temperature furnace body for heating and melting to obtain glass liquid 2; and then placing the taken molten glass 2 in a preheated container, carrying out solidification molding, and then annealing to obtain the block heat-absorbing energy-saving glass with high permeability and high heat insulation.

2. The method for preparing the energy-saving glass according to claim 1, wherein: the raw materials are proportioned according to the weight percentage as follows:

sodium carbonate: 10-35%, silicon dioxide: 40-70% and calcium carbonate: 5-25% of ferrous chloride: 0-5% of iron powder: 0-5% of ammonium chloride or ammonium sulfate, 0-10%; wherein the addition amounts of the ferrous chloride and the iron powder are not 0 at the same time.

3. The method for preparing the energy-saving glass according to claim 2, wherein: the raw material powder consists of a mixture 1 and a mixture 2, wherein:

the total weight of the mixture 1 as a main material is calculated according to 100%, and the mixture 1 is prepared from the following components in percentage by weight: sodium carbonate: 10-35%, silica: 40-70%, and a part of calcium carbonate: 5-25%;

calculating the total weight of the mixture 2 as an additive according to 100%, and mixing the mixture 2 by adopting the following component proportions according to the weight percentage:

ferrous chloride: 0-5% of iron powder: 0-5%, ammonium chloride or ammonium sulfate: 0-10% of calcium carbonate, and 0-5% of other part of calcium carbonate; wherein the addition amounts of the ferrous chloride and the iron powder are not 0 at the same time.

4. The method for preparing the energy-saving glass according to claim 1, wherein: the raw materials are mixed and then melted by adopting any one parameter or combination parameters of any several parameters of non-protective atmosphere, melting temperature and time, and different energy-saving glass with medium light transmission and high near infrared shielding is obtained according to the required performance requirements.

5. The method for preparing the energy-saving glass according to claim 1, wherein: the ferrous chloride is anhydrous ferrous chloride or ferrous chloride hydrate.

6. The method for preparing the energy-saving glass according to claim 1, wherein: the main raw materials of the cullet are other waste cullets with similar components which are partially or completely used.

7. The preparation method of the energy-saving glass according to claims 1 to 6, characterized by comprising the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, taking silicon dioxide, sodium carbonate and calcium carbonate, crushing to enable main raw materials to pass through a 100-300-mesh sieve, and then fully mixing for 10-30 min to obtain a mixture 1 serving as a main raw material for later use;

b. preparing glass liquid 1:

pouring the mixture 1 obtained in the step a into a crucible, putting the crucible into a lifting furnace, heating the mixture 1 from room temperature to 1300-1600 ℃ at a heating rate of 5-10 ℃/min, and preserving heat for 1-3 h to melt the mixture 1 into molten glass 1;

c. quenching and forming treatment of molten glass 1:

b, taking out the molten glass 1 in the step b, placing the molten glass in a cold container for molding, exploding a glass block due to internal stress, and storing a crucible of the residual molten glass 1 for later use;

d. preparing cullet:

taking out the cracked glass blocks in the step c, and physically crushing the glass blocks into small pieces of cullet;

e. mix 2 ingredients as additive material:

taking iron powder or ferrous chloride, calcium carbonate and ammonium salt as additive materials according to a raw material formula, wherein the additive amounts of the ferrous chloride and the iron powder are not 0 at the same time; crushing the additive material, sieving the crushed additive material by a sieve of 100-500 meshes, and then fully mixing for 20-40 min to obtain a mixture 2 serving as the additive material for later use;

f. preparing glass liquid 2:

adding cullet and the mixture 2 into the crucible in the step c, and placing the crucible in a high-temperature furnace body at 1400-1700 ℃ for heat preservation for 1-3 hours to form molten glass 2;

g. and (3) solidifying and forming molten glass 2:

taking out the molten glass 2 in the step f, placing the molten glass in a preheated container, and solidifying and forming the molten glass at the temperature of 300-600 ℃ in the container;

h. and (3) putting the solidified and molded sample into an annealing furnace at the temperature of 200-600 ℃ for annealing heat treatment, and annealing to obtain the medium-light-transmission high-near infrared shielding heat-insulation energy-saving glass product.

8. The method for preparing the energy-saving glass according to claim 7, wherein: in the step b, the mixture 1 is placed in a furnace body at 800-1000 ℃ for presintering treatment for 2-6 hours before being heated and melted, so that the mixture 1 discharges carbon dioxide.

9. The method for preparing the energy-saving glass according to claim 7, wherein: in the step d, the maximum width of the small pieces of crushed glass blocks obtained by crushing is not more than 20 mm; or the volume of the cullet pieces is less than 20 mm.

10. The method for preparing the energy-saving glass according to claim 7, wherein: in the step f, before heating and melting, material distribution is firstly carried out, and the material distribution is carried out in a crucible from top to bottom and consists of three layers, namely upper-layer cullet, a mixture 2 and lower-layer cullet, wherein the thickness of the upper-layer cullet is not less than 1cm, so that the contact between ferrous chloride or iron powder and air is reduced.

Technical Field

The invention relates to a preparation method of glass, in particular to a preparation method of block heat-absorbing energy-saving glass with high permeability and high heat insulation, which is mainly applied to the field of buildings or vehicle windows.

Background

At present, the energy consumption of buildings accounts for about 40 percent of the total social energy consumption, and the energy consumption of temperature control caused by heat transfer of glass accounts for 20 to 40 percent of the energy consumption of buildings. The traditional window glass, namely the single-layer soda-lime-silica glass, has poor heat insulation effect, is difficult to effectively block heat conduction generated by temperature difference and heat radiation generated by sunlight irradiation, and an energy-saving window is urgently needed to reduce the heat transfer effect.

The energy of the solar spectrum is concentrated in the wave band of 300-2500nm, wherein the proportion of the near-infrared wave band in the radiation power is up to 50%, so that the shielding of the near-infrared wave band can greatly reduce the radiation heat transfer from the outdoor to the indoor, and simultaneously can avoid influencing the transmission capability of visible light. The ideal energy-saving window can block near-infrared wave from radiating indoors, has high visible light transmission, high durability and low haze, and has certain mechanical strength. The energy-saving aims of reducing energy consumption and carbon emission can be achieved by blocking the heat radiation of the solar spectrum. Several commercial energy saving windows are currently on the market, each of which is functionally biased and has its own drawbacks.

At present, the traditional energy-saving glass can be divided into colored glass, Low-emissivity (Low-E) glass, film-coated glass, laminated glass and the like. The colored glass is colored by metal ions or metal particles, is heat-absorbing glass with simple and convenient process, low cost and durability, and also has the effect of glare resistance. The defects of poor sunlight absorption selectivity of the colored glass, low visible light transmittance while absorbing infrared light, and limited application value to houses which need more natural lighting in cities urgently. When the house is used in a house using colored glass for a long time, the house is not only harmful to the eyesight, but also easily causes adverse effects on the mental state of the residents. The most commonly used energy-saving glass is Low emissivity (Low-E) glass, which is an energy-saving glass selectively reflecting infrared bands and can be classified into an online type and an offline type according to different processes. The online Low-E glass functional layer is a doped metal oxide semiconductor and mainly comprises ATO, ITO or doped ZnO. The plating layer of the on-line Low-E glass is exposed outside and is easy to partially fall off due to scratch or sputtering pinhole defects in the transportation and installation processes. The core functional layer of the off-line Low-E glass is a metallic silver layer, but generally needs to be sealed in an interlayer of double-layer glass, belonging to the interlayerOne kind of laminated glass. Once the glass interlayer is damaged, the metallic silver layer is quickly oxidized, the infrared shielding effect disappears, and the visible transmittance is obviously reduced. The production process of laminated glass such as off-line low-E glass and vacuum/hollow glass is complicated, and the price can reach several times or even tens of times of that of single-layer glass. In addition, VO for intelligent window capable of automatically adjusting transmittance according to external temperature₂Filmed glass, but undesirable color, insulator-metal transition temperature above room temperature, poor stability, etc., remain some technical challenges that limit its widespread use.

On the contrary, the ferrous heat-absorbing energy-saving glass has good durability, long-term stable performance and no decline, and the using effect is not influenced by a small amount of scratches. The high visible light transparency is maintained, and simultaneously near infrared light can be shielded, particularly ferrous ions in the 800-1500nm waveband have extremely strong infrared absorption capability, and the daylighting and energy-saving performance are considered. However, compared with the traditional colored float glass, the prior ferrous heat-absorbing energy-saving glass has more complex process and higher production technology threshold. This is because ferrous ions are easily oxidized into ferric ions during firing, and lose the infrared shielding function. To protect ferrous ions from oxidation, several methods are currently available: firstly, a protective atmosphere is adopted in the glass melting process, the method is difficult to be applied to the traditional glass production line, and the danger of production accidents is greatly increased; secondly, a sulfur-carbon reducing agent is adopted, so that abnormal coloring of sulfur and carbon is easily caused, the glass is yellowish, and the appearance is influenced; and thirdly, the reducing substance is coated on the iron oxide and the iron powder, and the coating process needs to additionally carry out complicated steps such as dispersion, sintering, liquid phase reaction and the like, so that the production flow is more complicated.

Disclosure of Invention

In order to solve the problems of the prior art, the invention aims to overcome the defects in the prior art and provide a preparation method of energy-saving glass, the energy-saving glass is produced by adopting a simple melt quenching method, and ferrous ions can be quickly wrapped by glass melt without protective atmosphere on the premise of avoiding using a sulfur-carbon reducing agent, so that the direct contact between oxygen and the ferrous ions is greatly reduced, and the conversion from the ferrous ions to the ferrous ions is inhibited. The excess fining agent acts to stir or protect the ferrous ions, helping the latter to disperse uniformly throughout the bulk glass. The method is suitable for the traditional float glass production line, can greatly reduce the production complexity and danger, and is beneficial to quickly, massively and conveniently producing the ferrous heat-absorbing energy-saving glass.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

the preparation method of the energy-saving glass takes sodium carbonate, silicon dioxide, calcium carbonate, ferrous chloride or iron powder and ammonium chloride or ammonium sulfate as ammonium salt additives as raw materials, wherein the addition amounts of the ferrous chloride and the iron powder which are taken as iron source materials are not 0 at the same time; firstly, in a non-protective atmosphere furnace, mixing molten sodium carbonate, silicon dioxide and a part of calcium carbonate as main materials to form molten glass 1, taking out the molten glass 1, quenching, forming and crushing to obtain cullet; then mixing the cullet, ferrous chloride, iron powder, ammonium chloride or ammonium sulfate as an ammonium salt additive and the other part of calcium carbonate, and then placing the mixture in a high-temperature furnace body for heating and melting to obtain glass liquid 2; and then placing the taken molten glass 2 in a preheated container, carrying out solidification molding, and then annealing to obtain the block heat-absorbing energy-saving glass with high permeability and high heat insulation.

Preferably, the following raw materials are mixed according to the weight percentage:

sodium carbonate: 10-35%, silica: 40-70%, calcium carbonate: 5-25%, ferrous chloride: 0-5%, iron powder: 0-5% of ammonium chloride or ammonium sulfate, 0-10%; wherein the addition amounts of the ferrous chloride and the iron powder are not 0 at the same time.

Preferably, the raw meal consists of two parts, mix 1 and mix 2, wherein:

the total weight of the mixture 1 as a main material is calculated according to 100%, and the mixture 1 is prepared from the following components in percentage by weight: sodium carbonate: 10-35%, silica: 40-70%, and a part of calcium carbonate: 5-25%;

calculating the total weight of the mixture 2 as an additive according to 100%, and mixing the mixture 2 by adopting the following component proportions according to the weight percentage:

ferrous chloride: 0-5% or iron powder: 0-5%, 0-10% of ammonium chloride or ammonium sulfate and 0-5% of the other part of calcium carbonate; wherein the addition amounts of the ferrous chloride and the iron powder are not 0 at the same time.

Preferably, any one parameter or combination parameters of any several parameters of non-protective atmosphere, melting temperature and time are adopted to mix the raw materials and then melt the raw materials, and different energy-saving glass with medium-light-transmission and high-near infrared shielding is obtained according to the required performance requirements.

Preferably, the ferrous chloride is anhydrous ferrous chloride or ferrous chloride hydrate.

Preferably, the main raw material of the cullet is other waste cullet with similar components which is partially or completely used.

Preferably, the preparation method of the energy-saving glass comprises the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, taking silicon dioxide, sodium carbonate and calcium carbonate, crushing to enable main raw materials to pass through a 100-300-mesh sieve, and then fully mixing for 10-30 min to obtain a mixture 1 serving as a main raw material for later use;

b. preparing glass liquid 1:

pouring the mixture 1 obtained in the step a into a crucible, putting the crucible into a lifting furnace, heating the mixture 1 from room temperature to 1300-1600 ℃ at a heating rate of 5-10 ℃/min, and preserving heat for 1-3 h to melt the mixture 1 into molten glass 1;

c. quenching and forming treatment of molten glass 1:

b, taking out the molten glass 1 in the step b, placing the molten glass in a cold container for molding, exploding a glass block due to internal stress, and storing a crucible of the residual molten glass 1 for later use;

d. preparing cullet:

taking out the cracked glass blocks in the step c, and physically crushing the glass blocks into small pieces of cullet;

e. mix 2 ingredients as additive material:

taking iron powder, calcium carbonate, ferrous chloride and ammonium salt as additive materials according to a raw material formula, wherein the additive amounts of the ferrous chloride and the iron powder are not 0 at the same time; crushing the additive material, sieving the crushed additive material by a sieve of 100-500 meshes, and then fully mixing for 20-40 min to obtain a mixture 2 serving as the additive material for later use;

f. preparing glass liquid 2:

adding cullet and the mixture 2 into the crucible in the step c, and placing the crucible in a high-temperature furnace body at 1400-1700 ℃ for heat preservation for 1-3 hours to form molten glass 2;

g. and (3) solidifying and forming molten glass 2:

taking out the molten glass 2 in the step f, placing the molten glass in a preheated container, and carrying out solidification molding at the temperature of 300-600 ℃ in the container;

h. and (3) putting the solidified and molded sample into an annealing furnace at the temperature of 200-600 ℃ for annealing heat treatment, and annealing to obtain the medium-light-transmission high-near infrared shielding heat-insulation energy-saving glass product.

Preferably, in the step b, the mixture 1 is placed in a furnace body at 800-1000 ℃ for pre-burning treatment for 2-6 hours before being heated and melted, so that the mixture 1 discharges carbon dioxide.

Preferably, in the step d, the maximum width of the small pieces of the glass cullet blocks obtained by crushing is not more than 20 mm. Or preferably the volume of the cullet pieces is less than 20 mm.

Preferably, in the step f, before the heating and melting, the material is distributed, and the material is composed of three layers of upper-layer cullet, mixture 2 and lower-layer cullet from top to bottom in the crucible, wherein the thickness of the upper-layer cullet is not less than 1cm, so that the contact between ferrous chloride or iron powder and air is reduced.

Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:

1. the method adopts ferrous chloride (FeCl)₂) Or iron powder (Fe) as iron source, and ammonium salt or calcium carbonate (CaCO)₃) Generating neutral or reducing gas during melting and stirring the molten glass; the raw materials are cheap and easy to obtain, the pollution is less, and compared with the prior Low-E silver film or ITO coating filmThe glass and the like reduce heavy metal pollution, thereby greatly reducing the cost;

2. according to the invention, the low-valence iron element is coated by the cullet which is rapidly melted at high temperature, so that an additional process of coating treatment is omitted, and the production period is shortened;

3. the invention does not need protective atmosphere, adopts the melting quenching process and is suitable for the common float glass production line;

4. the ammonium salt (NH) used in the invention₄Cl or (NH)₄)₂SO₄) Or iron powder (Fe) is used as a reducing agent to avoid the influence of abnormal coloring of sulfur and carbon on the glass performance;

5. the method is simple and easy to implement, low in cost and suitable for popularization and application.

Drawings

FIG. 1 is a graph showing the effect of the transmission spectrum performance of the energy-saving glass according to embodiments 1 to 6 of the present invention.

Detailed Description

The above-described scheme is further illustrated below with reference to specific embodiments, which are detailed below:

example 1

In this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows: silicon dioxide (SiO)₂) 58.47% of sodium carbonate (Na)₂CO₃) 24.11% of calcium carbonate (CaCO)₃) 15.87 percent, crushing to enable the main raw materials to pass through a 200-mesh sieve, and then fully mixing for 10min to obtain a mixture 1 serving as the main raw material for later use;

b. preparing glass liquid 1:

pouring the mixture 1 obtained in the step a into a crucible, putting the crucible into a lifting furnace, heating the mixture 1 from room temperature to 1500 ℃ at the heating rate of 5 ℃/min, and preserving heat for 2 hours to melt the mixture 1 into molten glass 1;

c. quenching and forming treatment of molten glass 1:

b, taking out the molten glass 1 in the step b, placing the molten glass in a cold container for molding, exploding a glass block due to internal stress, and storing a crucible of the residual molten glass 1 for later use;

d. preparing cullet:

taking out the cracked glass blocks in the step c, and physically crushing the glass blocks into small pieces of cullet; making the maximum width of the small glass cullet blocks not more than 20 mm;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: ferrous chloride tetrahydrate (FeCl)₂·4H₂O) is 0.74%, ammonium chloride (NH)₄Cl) was 0.82%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. preparing glass liquid 2:

adding cullet and the mixture 2 into the crucible in the step c, firstly distributing materials, wherein the crucible consists of an upper layer of cullet, the mixture 2 and a lower layer of cullet from top to bottom, the thickness of the upper layer of cullet is 1cm, contact between ferrous chloride or iron powder and air is reduced, and then placing the crucible into which the cullet and the mixture 2 are added into a 1600 ℃ high-temperature furnace body for heat preservation for 2 hours to form molten glass 2;

g. and (3) solidifying and forming molten glass 2:

taking out the molten glass 2 in the step f, placing the molten glass in a preheated container, and solidifying and forming the molten glass at the temperature of 500 ℃;

h. and (3) putting the solidified and molded sample into an annealing furnace at 560 ℃ for annealing heat treatment, and annealing to obtain the medium-light-transmission high-near infrared shielding heat-insulation energy-saving glass product.

The transmission spectrum performance effect graph of the energy-saving glass prepared by the method of the embodiment is shown in fig. 1, wherein the spectrum performance curve marked with 1 is the transmission spectrum performance curve of the energy-saving glass prepared by the embodiment.

Example 2

This embodiment is substantially the same as the first embodiment, and is characterized in that:

in this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows: silicon dioxide (SiO)₂) 59.28% of sodium carbonate (Na)₂CO₃) 22.70 percent of calcium carbonate (CaCO)₃) 15.91 percent, the main raw materials are crushed to be sieved by a 200-mesh sieve and then fully mixed for 10min to obtain a mixture 1 which is used as the main raw material for standby;

b. the step is the same as the first embodiment;

c. the step is the same as the first embodiment;

d. the step is the same as the first embodiment;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: ferrous chloride tetrahydrate (FeCl)₂·4H₂O) is 1.37%, ammonium chloride (NH)₄Cl) was 0.74%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. the step is the same as the first embodiment;

g. the step is the same as the first embodiment;

h. the procedure is the same as in the first embodiment.

The transmission spectrum performance effect graph of the energy-saving glass prepared by the method of the embodiment is shown in fig. 1, wherein the spectrum performance curve labeled as 2 is the transmission spectrum performance curve of the energy-saving glass prepared by the embodiment.

Example 3

This embodiment is substantially the same as the above embodiment, and is characterized in that:

in this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows: silicon dioxide (SiO)₂) 58.89% of sodium carbonate (Na)₂CO₃) 22.61% of calcium carbonate (CaCO)₃) 15.84 percent, the main raw materials are crushed to be sieved by a 200-mesh sieve and then fully mixed for 10min to obtain a mixture 1 which is used as the main raw material for standby;

b. the step is the same as the first embodiment;

c. the step is the same as the first embodiment;

d. the step is the same as the first embodiment;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: ferrous chloride tetrahydrate (FeCl)₂·4H₂O) is 1.92%, ammonium chloride (NH)₄Cl) was 0.74%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. the step is the same as the first embodiment;

g. the step is the same as the first embodiment;

h. the procedure is the same as in the first embodiment.

The transmission spectrum performance effect graph of the energy-saving glass prepared by the method of the embodiment is shown in fig. 1, wherein the spectrum performance curve labeled as 3 is the transmission spectrum performance curve of the energy-saving glass prepared by the embodiment.

Example 4

This embodiment is substantially the same as the above embodiment, and is characterized in that:

in this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows: silicon dioxide (SiO)₂) 59.49% of sodium carbonate (Na)₂CO₃) 22.78% of calcium carbonate (CaCO)₃) 15.96 percent, the main raw materials are crushed to be sieved by a 200-mesh sieve and then fully mixed for 10min to obtain a mixture 1 which is used as the main raw material for standby;

b. the step is the same as the first embodiment;

c. the step is the same as the first embodiment;

d. the step is the same as the first embodiment;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: iron powder (Fe)0.39% of calcium carbonate (CaCO)₃) 1.39%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. the step is the same as the first embodiment;

g. the step is the same as the first embodiment;

h. the procedure is the same as in the first embodiment.

The transmission spectrum performance effect graph of the energy-saving glass prepared by the method of the embodiment is shown in fig. 1, wherein the spectrum performance curve labeled 4 is the transmission spectrum performance curve of the energy-saving glass prepared by the embodiment.

Example 5

This embodiment is substantially the same as the above embodiment, and is characterized in that:

in this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows: silicon dioxide (SiO)₂) 58.90% of sodium carbonate (Na)₂CO₃) 22.56 percent of calcium carbonate (CaCO)₃) 15.80 percent, the main raw materials are crushed to be sieved by a 200-mesh sieve and then fully mixed for 10min to obtain a mixture 1 which is used as the main raw material for standby;

b. the step is the same as the first embodiment;

c. the step is the same as the first embodiment;

d. the step is the same as the first embodiment;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: ferrous chloride tetrahydrate (FeCl)₂·4H₂O) is 1.36 percent, calcium carbonate (CaCO)₃) 1.37%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. the step is the same as the first embodiment;

g. the step is the same as the first embodiment;

h. the procedure is the same as in the first embodiment.

The transmission spectrum performance effect graph of the energy-saving glass prepared by the method of the embodiment is shown in fig. 1, wherein the spectrum performance curve labeled 5 is the transmission spectrum performance curve of the energy-saving glass prepared by the embodiment.

Example 6

This embodiment is substantially the same as the above embodiment, and is characterized in that:

in this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows: silicon dioxide (SiO)₂) 59.87% of sodium carbonate (Na)₂CO₃) 22.93 percent of calcium carbonate (CaCO)₃) 16.06 percent, crushing to enable the main raw materials to pass through a 200-mesh sieve, and then fully mixing for 10min to obtain a mixture 1 serving as the main raw material for later use;

b. the step is the same as the first embodiment;

c. the step is the same as the first embodiment;

d. the step is the same as the first embodiment;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: 0.39% of iron powder (Fe) and ammonium chloride (NH)₄Cl) was 0.75%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. the step is the same as the first embodiment;

g. the step is the same as the first embodiment;

h. the procedure is the same as in the first embodiment.

The transmission spectrum performance effect graph of the energy-saving glass prepared by the method of the embodiment is shown in fig. 1, wherein the spectrum performance curve labeled 6 is the transmission spectrum performance curve of the energy-saving glass prepared by the embodiment.

Example 7

This embodiment is substantially the same as the above embodiment, and is characterized in that:

in this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows: silicon dioxide (SiO)₂) 59.28% of sodium carbonate (Na)₂CO₃) 22.70 percent of calcium carbonate (CaCO)₃) 15.91 percent, the main raw materials are crushed to be sieved by a 200-mesh sieve and then fully mixed for 10min to obtain a mixture 1 which is used as the main raw material for standby;

b. the step is the same as the first embodiment;

c. the step is the same as the first embodiment;

d. the step is the same as the first embodiment;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: ferrous chloride tetrahydrate (FeCl)₂·4H₂O) is 1.37%, ammonium chloride (NH)₄Cl) was 0.74%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. preparing glass liquid 2:

adding cullet and the mixture 2 into the crucible in the step c, firstly distributing materials, wherein the crucible consists of an upper layer of cullet, the mixture 2 and a lower layer of cullet from top to bottom, the thickness of the upper layer of cullet is 1cm, contact between ferrous chloride or iron powder and air is reduced, and then placing the crucible into which the cullet and the mixture 2 are added into a 1600 ℃ high-temperature furnace body for heat preservation for 3.5 hours to form molten glass 2;

g. the step is the same as the first embodiment;

h. the procedure is the same as in the first embodiment.

Example 8

This embodiment is substantially the same as the above embodiment, and is characterized in that:

in this embodiment, a method for preparing energy-saving glass includes the following steps:

a. the mixture 1 as the main raw material comprises the following ingredients:

according to the raw material formula, the weight percentage is as follows:silicon dioxide (SiO)₂) 59.28% of sodium carbonate (Na)₂CO₃) 22.70 percent of calcium carbonate (CaCO)₃) 15.91 percent, the main raw materials are crushed to be sieved by a 200-mesh sieve and then fully mixed for 10min to obtain a mixture 1 which is used as the main raw material for standby;

b. the step is the same as the first embodiment;

c. the step is the same as the first embodiment;

d. the step is the same as the first embodiment;

e. mix 2 ingredients as additive material:

according to the raw material formula, the weight percentage is as follows: ferrous chloride tetrahydrate (FeCl)₂·4H₂O) is 1.37%, ammonium chloride (NH)₄Cl) was 0.74%; crushing, sieving with a 500-mesh sieve, and then fully mixing for 20min to obtain a mixture 2 serving as an additive material for later use;

f. preparing glass liquid 2:

adding cullet and the mixture 2 into the crucible in the step c, firstly distributing materials, wherein the crucible consists of an upper layer of cullet, the mixture 2 and a lower layer of cullet from top to bottom, the thickness of the upper layer of cullet is 1cm, contact between ferrous chloride or iron powder and air is reduced, and then placing the crucible into which the cullet and the mixture 2 are added into a 1500 ℃ high-temperature furnace body for heat preservation for 2 hours to form molten glass 2;

g. the step is the same as the first embodiment;

h. the procedure is the same as in the first embodiment.

The transmission spectrum performance effect graph of the energy-saving glass prepared by the method of the embodiment is shown in fig. 1, wherein the spectrum performance curve labeled as 2 is the transmission spectrum performance curve of the energy-saving glass prepared by the embodiment.

Experimental test analysis:

the visible and near infrared transmittance of the energy-saving glass is measured as follows:

1. test samples: the energy-saving glass prepared in the embodiments 1 to 8 has a thickness of 4 mm.

2. The test method comprises the following steps: the transmittance was measured using a UV-Visible/NIR spectrophotometer manufactured by HITACHI, Japan.

The wavelength range of the visible light transmittance test is 380-780 nm, and the wavelength range of the near-infrared light transmittance test is 780-2500 nm.

3. The test results are shown in Table 1.

TABLE 1 table of the average values of the visible and near infrared transmittance measurements for energy saving glass prepared according to the examples of the present invention

Group of	Visible light transmittance (%)	Near Infrared light transmittance (%)
			Example 1	76.38	52.51
Example 2	70.51	17.56
			Example 3	45.72	6.36
Example 4	66.23	15.57
			Example 5	81.23	71.04
Example 6	19.59	2.49
			Example 7	57.59	9.13
Example 8	69.20	28.34

As can be seen from the test results in Table 1, the types and proportions of the components of batch 2 have a significant effect on the properties of the glass. Comparative examples 1 to 3 show that the iron chloride (FeCl) is accompanied by₂) The concentration increases, the near infrared shielding ability gradually increases but the visible light transmittance decreases, and example 2 well maintains the balance of visible light transmittance and infrared shielding. It is understood from comparative examples 2 and 4 that the use of iron powder as an iron source also provides a heat absorbing glass having high visible light transmittance and high infrared shielding. Comparative examples 4 and 6 show that calcium carbonate (CaCO)₃) Decomposition at high temperature produces gas, compared to ammonium chloride (NH)₄Cl) can better stir the glass liquid, so that iron powder is uniformly distributed in the glass liquid, is moderately oxidized to generate ferrous ions, and the visible wave band transmittance is improved. The undispersed molten iron powder produces dark brown flocs, which seriously affect the visible transmittance. Comparative examples 2 and 5 show that₃) Ammonium chloride (NH)₄Cl) reducing ammonia (NH) produced by decomposition₃) Can protect ferrous chloride (FeCl)₂) The brought ferrous ions ensure excellent infrared shielding performance. The energy-saving glass prepared by the preparation method of the energy-saving glass shields near infrared light and keeps high visible transmittance, compared with the same type of products, the energy-saving glass has the advantages of cheap and easily available production raw materials and greatly simplified production process. As can be seen from comparative examples 2 and 7, prolonged heating resulted in volatilization of a portion of the glass matrix, increased ferrous ion concentration, enhanced near infrared shielding ability butThe visible light transmittance is reduced. As can be seen from comparative examples 2 and 7, prolonged heating time results in volatilization of a portion of the glass substrate, an increase in ferrous ion concentration, an increase in near infrared shielding ability but a decrease in visible light transmittance. It can be known from comparative examples 2 and 8 that reducing the heating temperature is not favorable to the quick melting of cullet on the one hand and wraps up ferrous ion, and on the other hand is unfavorable to the ferric ion and takes place chemical equilibrium to move to ferrous ion direction, and ferrous ion concentration reduces, and infrared shielding effect reduces thereupon. The viscosity of the mixed glass liquid in the embodiment 7 and the embodiment 8 is obviously higher than that in the embodiments 1 to 6, more bubbles exist in the quenching forming process, and the visible transmittance is reduced. In addition, the poor fluidity of the mixed glass liquid in the examples 7 and 8 is not favorable for the molding of the glass block, and the striae are generated in the glass block to influence the uniformity.

The energy-saving glass prepared by the preparation method of the energy-saving glass provided by the embodiment shields near infrared light and keeps high visible transmittance, compared with the same type of product, the energy-saving glass has the advantages that the production raw materials are cheap and easy to obtain, and the production process is greatly simplified.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the embodiments, and various changes and modifications can be made according to the purpose of the invention, and any changes, modifications, substitutions, combinations or simplifications made according to the spirit and principle of the technical solution of the present invention shall be equivalent substitutions, as long as the purpose of the present invention is met, and the present invention shall fall within the protection scope of the present invention without departing from the technical principle and inventive concept of the present invention.