Crystal glass and preparation method thereof
阅读说明：本技术 一种水晶玻璃及其制备方法 (Crystal glass and preparation method thereof ) 是由 郭龙坤 于 2019-11-01 设计创作，主要内容包括：本发明公开了一种水晶玻璃及其制备方法,属于水晶玻璃材料领域。包括SiO<Sub>2</Sub> 58-62％；K<Sub>2</Sub>O 6.0-8％；Na<Sub>2</Sub>O 4-6％；B<Sub>2</Sub>O<Sub>3</Sub> 2-5％；CaO：0-1％；ZnO:0.5-1％；Li<Sub>2</Sub>O 0.5-1％；TiO<Sub>2</Sub> 8-10％；Bi<Sub>2</Sub>O<Sub>3</Sub> 5-6％；La<Sub>2</Sub>O<Sub>3</Sub> 2-3％；Y<Sub>2</Sub>O<Sub>3</Sub> 0-3％。本发明在配方中,加入了氧化铋Bi<Sub>2</Sub>O<Sub>3</Sub>,加入氧化铋后,水晶玻璃的密度增大,得到的水晶玻璃的折射率高,提高了水晶玻璃的品质、热稳定性和耐酸和耐碱性能,缩短了反应时间；提高了生产效率,节省了能耗。(The invention discloses crystal glass and a preparation method thereof, and belongs to the field of crystal glass materials. Comprising SiO 2 58‑62％；K 2 O 6.0‑8％；Na 2 O 4‑6％；B 2 O 3 2‑5％；CaO：0‑1％；ZnO:0.5‑1％；Li 2 O 0.5‑1％；TiO 2 8‑10％；Bi 2 O 3 5‑6％；La 2 O 3 2‑3％；Y 2 O 3 0 to 3 percent. In the formula of the invention, bismuth oxide Bi is added 2 O 3 After the bismuth oxide is added, the density of the crystal glass is increased, the refractive index of the obtained crystal glass is high, the quality, the thermal stability, the acid resistance and the alkali resistance of the crystal glass are improved, and the reaction time is shortened; the production efficiency is improved, and the energy consumption is saved.)
1. A crystal glass, characterized in that: comprises the following components in percentage by weight: SiO 2258-62％；K2O 6.0-8％；Na2O 4-6％；B2O32-5％；CaO：0-1％；ZnO:0.5-1％；Li2O 0.5-1％；TiO28-10％；Bi2O35-6％；La2O32-3％；Y2O30-3％。
2. The crystal glass according to claim 1, wherein: comprises the following components in percentage by weight: SiO 2260-62％；K2O 7-8％；Na2O 5-6％；B2O34-5％；CaO：0.5-1％；ZnO:0.8-1％；Li2O 0.5-0.8％；TiO29-10％；Bi2O35.5-6％；La2O32.5-3％；Y2O32-3％。
3. The crystal glass according to claim 1, wherein: comprises the following components in percentage by weight: SiO 2261-61.5％；K2O 7.2-7.5％；Na2O 5.2-5.5％；B2O34.0-4.2％；CaO：0.7-0.9％；ZnO:0.85-0.9％；Li2O 0.7-0.8％；TiO29.0-9.5％；Bi2O35.6-6％；La2O32.6-2.8％；Y2O32.1-2.3％。
4. The crystal glass according to claim 3, wherein: comprises the following components in percentage by weight: SiO 2261.2％；K2O 7.3％；Na2O 5.3％；B2O34.0％；CaO：0.8％；ZnO:0.9％；Li2O 0.7％；TiO29.3％；Bi2O35.8％；La2O32.7％；Y2O32.2％。
5. A method for producing a crystal glass according to any one of claims 1 to 4, characterized in that: the method comprises the following steps:
(1) drying the proportioned raw materials; mixing SiO2Ball milling to obtain a particle size of 0.25-0.35 mm; mixing the rest ingredients, and grinding to 0.1-0.2mm with a ball mill;
(2) grinding SiO2And after fully mixing with the rest components, adding the mixture into a smelting furnace for melting, casting and molding, cooling and annealing to obtain the crystal glass.
6. The method for producing a crystal glass according to claim 5, wherein: the melting temperature in the melting furnace in the step (2) is 1650-.
7. The method for producing a crystal glass according to claim 5, wherein: after cooling to 200-400 ℃ in the step (2), annealing treatment can be carried out.
Technical Field
The invention relates to the field of crystal glass materials, in particular to crystal glass and a preparation method thereof.
Background
The production process of the glass product basically comprises the steps of batch preparation, melting, molding and heat treatment. The preparation of the batch mixture refers to that according to a designed material recipe, various raw materials are dehumidified, deironized, crushed, weighed and mixed with ingredients in a mixer uniformly according to the proportion in the material recipe, the main raw materials of the glass comprise quartz sand, limestone, feldspar, soda ash, boric acid and the like, wherein the limestone, the feldspar, the soda ash and the boric acid simultaneously serve as cosolvent. The melting of glass refers to a process of converting a batch into molten glass which has a uniform chemical composition, is bubble-free and meets the forming requirement through high-temperature heating, and can be divided into five stages, namely, the formation of a sintered body, the formation of the molten glass, the clarification of the molten glass, the homogenization of the molten glass and the cooling of the molten glass.
The crystal glass is formed by melting and crystallizing common glass to obtain crystals and then casting the crystals. The existing crystal glass is divided into high-lead crystal glass (PbO is more than or equal to 30 percent) and medium-lead crystal glass (PbO is more than or equal to 24 percent); lead oxide (PbO) and barium oxide (BaO) are common components in traditional crystals, and can improve the refractive index and the dispersion rate of glass. In the existing glass formula, the content of PbO and BaO in the glass component is increased in order to improve the refractive index and the dispersion ratio. However, the crystal glass product is often used as a vessel for bearing food, lead is dissolved out in the using process, the toxicity is high, and the crystal glass product is harmful to human health. Lead-free glass has also been produced. Under the condition of no adding Pb and Ba, the refractive index of the glass is often lower, so that the higher refractive index is difficult to achieve, and the quality of the crystal glass is influenced. Meanwhile, because the crystal glass is a crystal, the thermal stability of the crystal glass is easily influenced, and the production efficiency is reduced.
Disclosure of Invention
In order to solve the problems, the invention provides the lead-free crystal glass with high refractive index and good thermal stability and the preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the crystal glass comprises the following components in percentage by weight: SiO 2258-62％；K2O 6.0-8％；Na2O4-6％；B2O32-5％；CaO：0-1％；ZnO:0.5-1％；Li2O 0.5-1％；TiO28-10％；Bi2O35-6％；La2O32-3％；Y2O30-3％。
Preferably, the crystal glass comprises the following components in percentage by weight: SiO 2260-62％；K2O 7-8％；Na2O 5-6％；B2O34-5％；CaO：0.5-1％；ZnO:0.8-1％；Li2O 0.5-0.8％；TiO29-10％；Bi2O35.5-6％；La2O32.5-3％；Y2O32-3％。
Preferably, the crystal glass comprises the following components in percentage by weight: SiO 2261-61.5％；K2O 7.2-7.5％；Na2O 5.2-5.5％；B2O34.0-4.2％；CaO：0.7-0.9％；ZnO:0.85-0.9％；Li2O 0.7-0.8％；TiO29.0-9.5％；Bi2O35.6-6％；La2O32.6-2.8％；Y2O32.1-2.3％。
Preferably, the crystal glass comprises the following components in percentage by weight: SiO 2261.2％；K2O 7.3％；Na2O 5.3％；B2O34.0％；CaO：0.8％；ZnO:0.9％；Li2O 0.7％；TiO29.3％；Bi2O35.8％；La2O32.7％；Y2O32.2％。
The invention also provides a preparation method of the crystal glass.
A preparation method of crystal glass comprises the following steps:
(1) drying the proportioned raw materials; mixing SiO2Ball milling to obtain a particle size of 0.25-0.35 mm; mixing the rest ingredients, and grinding to 0.1-0.2mm with a ball mill;
(2) grinding SiO2And after fully mixing with the rest components, adding the mixture into a smelting furnace for melting, casting and molding, cooling and annealing to obtain the crystal glass.
Preferably, the melting temperature in the furnace in the step (2) is 1650-.
Preferably, the annealing treatment can be performed after cooling to 200-400 ℃ in the step (2).
The crystal glass and the preparation method thereof have the beneficial effects that:
(1) in the formula of the invention, bismuth oxide Bi is added2O3After the bismuth oxide is added, the density of the crystal glass is increased, the refractive index of the obtained crystal glass is high, the refractive index of the crystal glass is obviously increased under the condition that lead and barium are not doped in time, and the quality of the crystal glass is improved.
(2) Titanium oxide (TiO) added in the present invention2) Can reduce the generation of impurities, increase the refractive index of the crystal glass and improve the glass in the production process of the crystal glassThermal stability of the glass.
(3) The invention adds K2O、Na2And the alkaline substances such as O and the like can promote the dissolution of the ingredients, shorten the production time and reduce the energy consumption. And added ZnO and La2O3The rapid melting of the ingredients is promoted, the acid resistance and alkali resistance of the whole glass are improved, and the thermal stability is improved.
(4) In the preparation method, the silicon oxide and the ingredients are respectively ball-milled to 0.25-0.35mm and 0.1-0.2mm, so that the materials can be rapidly melted, and the reaction time is shortened; the production efficiency is improved, and the energy consumption is saved.
Detailed Description
The present invention will be described in further detail with reference to the following examples.