A kind of glass ceramics and preparation method thereof
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A technology of glass-ceramic and glass liquid, applied in the field of glass-ceramic and its preparation, can solve the problems of high melting point, high refractive index, small thermal conductivity, etc.
Active Publication Date: 2015-12-30
JIANGSU AOLAN ARCHITECTURE GLASS
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[0026] (2) After fully mixing the above raw materials, place them in a crucible, heat and keep warm for 3 hours to obtain molten glass;
[0027] (3) Pour the molten glass in step (2) into a preheated graphite mold to form it, and perform annealing treatment at 900°C to obtain a glass-ceramic.
[0028] Measured by adding La 2 o 3 After the conversion temperature than without adding La 2 o 3 When the temperature is reduced by 82°C; the hardness measured by the Vickers hardness tester is 634.
[0031] (2) After fully mixing the above raw materials, place them in a crucible, heat and keep warm for 3 hours to obtain molten glass;
[0032] (3) Pour the molten glass in step (2) into a preheated graphite mold to form it, and perform annealing treatment at 900°C to obtain a glass-ceramic.
[0033] Measured by adding La 2 o 3 After the conversion temperature than without adding La 2 o 3 When the temperature is reduced by 57°C; the hardness measured by the Vickers hardness tester is 589.
[0036] (2) After fully mixing the above raw materials, place them in a crucible, heat and keep warm for 3 hours to obtain molten glass;
[0037] (3) Pour the molten glass in step (2) into a preheated graphite mold to form it, and perform annealing treatment at 900°C to obtain a glass-ceramic.
[0038] Measured by adding La 2 o 3 After the conversion temperature than without adding La 2 o 3 When the temperature is lowered, the temperature should be reduced by 64°C; the hardness measured by the Vickers hardness tester is 674.
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Abstract
The invention belongs to the field of glass production, and discloses microcrystalline glass and a preparation method thereof. The microcrystalline glass comprises following components by weight: 70-80 parts of silica, 15-20 parts of boric acid , 5-10 parts of sodiumhydroxide, 2-5 parts of a nucleating agent, 1-3 parts of lanthanumtrioxide, 5-10 parts of calciumcarbonate and 1-3 parts of sodiumnitrate. The method includes fully mixing the components, adding the mixture into a crucible and heating, maintaining the temperature for 3 h to obtain glass liquid, forming, and annealing to obtain the microcrystalline glass. The microcrystalline glass has low a transformation temperature.
Description
technical field [0001] The invention belongs to the field of glass production, in particular to a glass-ceramic and a preparation method thereof. Background technique [0002] Glass can be divided into oxide glass and non-oxide glass according to its main component, and its main component is SiO 2 , SiO 2 It is widely used in glass, casting, ceramics and refractory materials, smeltingferrosilicon, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasives and other industries. [0003] With the gradual increase in the application of glass, the research on glasses with different properties has gradually become the focus of people's research, especially by changing the composition of the glass, so that the glass has different properties. Zirconium dioxide has excellent thermal and chemical stability, high melting point, high boiling point, small thermal conductivity, high hardness, good wear resistance, insulator at room temperature, and hi...
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