阅读说明：本技术 一种低温封接玻璃及其制作工艺 (Low-temperature sealing glass and manufacturing process thereof ) 是由 王森林 杨阳 于 2019-02-11 设计创作，主要内容包括：本发明属于玻璃制造技术领域,尤其为一种低温封接玻璃,由以下重量的计份数原料组成：氧化铝4-6份,氧化硼6-8份,氧化钡4-6份,氧化钙6-8份,氧化钠10-14份,氧化钾2-4份,氧化钕12-16份；本发明可使玻璃制品在低温下进行封接,封接温度控制在700℃左右,降低封接温度；可以减少对封接器件的热冲击、热腐蚀以及变形等。(The invention belongs to the technical field of glass manufacturing, and particularly relates to low-temperature sealing glass which is prepared from the following raw materials in parts by weight: 4-6 parts of aluminum oxide, 6-8 parts of boron oxide, 4-6 parts of barium oxide, 6-8 parts of calcium oxide, 10-14 parts of sodium oxide, 2-4 parts of potassium oxide and 12-16 parts of neodymium oxide; the invention can seal the glass product at low temperature, the sealing temperature is controlled at about 700 ℃, and the sealing temperature is reduced; thermal shock, thermal corrosion, deformation and the like to the sealing device can be reduced.)

1. The low-temperature sealing glass is characterized by comprising the following raw materials in parts by weight: 4-6 parts of aluminum oxide, 6-8 parts of boron oxide, 4-6 parts of barium oxide, 6-8 parts of calcium oxide, 10-14 parts of sodium oxide, 2-4 parts of potassium oxide and 12-16 parts of neodymium oxide.

2. A low-temperature sealing glass according to claim 1, characterized in that: the alumina is a high hardness compound, an ionic crystal that is ionizable at high temperatures, and is commonly used in the manufacture of refractory materials.

3. A low-temperature sealing glass according to claim 1, characterized in that: the boric oxide is a white waxy solid that dissolves many basic metal oxides when melted to produce characteristic colored glassy borates and metaborates useful in the production of elemental boron and fine boron compounds.

4. A low-temperature sealing glass according to claim 1, characterized in that: the barium oxide is colorless cubic crystal, reacts with water to form barium hydroxide, and is easy to absorb moisture and carbon dioxide in the air to generate barium carbonate.

5. A low-temperature sealing glass according to claim 1, characterized in that: the calcium oxide is an inorganic compound, has white powder on the surface, is off-white when not pure, is light yellow or gray when containing impurities, and has hygroscopicity.

6. A low-temperature sealing glass according to claim 1, characterized in that: the neodymium oxide is mainly used as a colorant for glass and ceramics, and is used as a raw material for manufacturing metal neodymium and a raw material for manufacturing ferromagnetic neodymium iron boron.

7. The low-temperature sealing glass according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 5 parts of aluminum oxide, 7 parts of boron oxide, 5 parts of barium oxide, 7 parts of calcium oxide, 12 parts of sodium oxide, 3 parts of potassium oxide and 14 parts of neodymium oxide.

8. A process according to claim 1, comprising the steps of:

s1, melting the ingredients: according to the components, the ingredients are uniformly stirred, poured into a crucible, continuously heated at 1340-1360 ℃ for 7-8 hours, poured into the crucible, and fed once per hour for 7 times in total;

s2, clarification stage: controlling the temperature in the crucible at 1390-1410 ℃ and keeping the temperature for 7-8 hours, simultaneously stirring and defoaming for four times of stirring, wherein the specific speed is 60 rpm, 40 rpm, 20 rpm and 10 rpm in sequence, the stirring time is 0.5 hour, 3 hours and 0.5 hour in sequence, and the stirring and precipitating are carried out for 4-5 hours;

s3, cooling: reducing the temperature in the crucible to 940-960 ℃;

s4, annealing stage: pouring the raw materials into a metal mold, putting into an annealing furnace, continuously cooling twice, cooling to 520-540 ℃ for the first time, preserving heat for 8 hours, cooling to 320-340 ℃ for the second time, and naturally cooling to normal temperature to form the glass on the basis of cooling to 10 ℃ per hour.

Technical Field

The invention belongs to the technical field of glass manufacturing, and particularly relates to low-temperature sealing glass and a manufacturing process thereof.

Background

The sealing glass is an intermediate glass for sealing glass, ceramics, metals, composite materials, and the like. Can be divided into low-temperature sealing glass and high-temperature sealing glass. When in use, the sealing glass with proper softening temperature and thermal expansion coefficient is selected. High lead sealing glasses that can be used at relatively low temperatures are known as solder glasses.

The original sealing glass process has high cost for sealing at high temperature, and has poor thermal shock, thermal corrosion and deformation effects, thereby further influencing the manufacturing cost of enterprises.

Disclosure of Invention

To solve the problems set forth in the background art described above. The invention provides low-temperature sealing glass and a manufacturing process thereof, and the low-temperature sealing glass has the characteristic of convenient sealing.

In order to achieve the purpose, the invention provides the following technical scheme: the low-temperature sealing glass is composed of the following raw materials in parts by weight: 4-6 parts of aluminum oxide, 6-8 parts of boron oxide, 4-6 parts of barium oxide, 6-8 parts of calcium oxide, 10-14 parts of sodium oxide, 2-4 parts of potassium oxide and 12-16 parts of neodymium oxide.

As a preferable embodiment of the low-temperature sealing glass of the present invention, the alumina is a compound having high hardness, an ionic crystal ionizable at high temperature, and is commonly used for manufacturing refractory materials.

As a preferred embodiment of the low-temperature sealing glass of the present invention, the boric oxide is a white waxy solid, which can dissolve many alkaline metal oxides during melting to form glassy borates and metaborates with characteristic colors, and is used for preparing elemental boron and fine boron compounds.

As a preferred technical scheme of the low-temperature sealing glass, the barium oxide is colorless cubic crystal, reacts with water to form barium hydroxide, and is easy to absorb moisture and carbon dioxide in the air to generate barium carbonate.

In a preferred embodiment of the low-temperature sealing glass of the present invention, the calcium oxide is an inorganic compound, has a white powder surface, is off-white when impure, is light yellow or gray when containing impurities, and has hygroscopicity.

In a preferred embodiment of the low-temperature sealing glass of the present invention, the neodymium oxide is mainly used as a colorant for glass and ceramics, and is used as a raw material for producing metal neodymium and a raw material for ferromagnetic neodymium iron boron.

The preferred technical scheme of the low-temperature sealing glass provided by the invention comprises the following raw materials in parts by weight: 5 parts of aluminum oxide, 7 parts of boron oxide, 5 parts of barium oxide, 7 parts of calcium oxide, 12 parts of sodium oxide, 3 parts of potassium oxide and 14 parts of neodymium oxide.

A manufacturing process comprises the following steps:

s1, melting the ingredients: according to the components, the ingredients are uniformly stirred, poured into a crucible, continuously heated at 1340-1360 ℃ for 7-8 hours, poured into the crucible, and fed once per hour for 7 times in total;

s2, clarification stage: controlling the temperature in the crucible at 1390-1410 ℃ and keeping the temperature for 7-8 hours, simultaneously stirring and defoaming for four times of stirring, wherein the specific speed is 60 rpm, 40 rpm, 20 rpm and 10 rpm in sequence, the stirring time is 0.5 hour, 3 hours and 0.5 hour in sequence, and the stirring and precipitating are carried out for 4-5 hours;

s3, cooling: reducing the temperature in the crucible to 940-960 ℃;

s4, annealing stage: pouring the raw materials into a metal mold, putting into an annealing furnace, continuously cooling twice, cooling to 520-540 ℃ for the first time, preserving heat for 8 hours, cooling to 320-340 ℃ for the second time, and naturally cooling to normal temperature to form the glass on the basis of cooling to 10 ℃ per hour.

Compared with the prior art, the invention has the beneficial effects that: the invention can seal the glass product at low temperature, the sealing temperature is controlled at about 700 ℃, and the sealing temperature is reduced; thermal shock, thermal corrosion, deformation and the like to the sealing device can be reduced.

Detailed Description