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Method for producing micro crystal glass

A technology of glass-ceramic and production method, which is applied in the direction of glass production, etc., can solve the problems of long production cycle, the ratio of crystal phase depends on the overall crystallization ability of the basic glass, low production efficiency and yield rate, etc., and achieve huge economic benefits and social benefits. Benefits, shortening the time of nucleation and crystallization, and improving the product qualification rate

Inactive Publication Date: 2005-09-07
匡敬忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. The proportion of the crystal phase in the glass-ceramics depends on the overall crystallization ability of the base glass
2. The crystallization process is difficult to control
3. Long overall crystallization time, low production efficiency and yield
The disadvantages are: 1. The densification depth of the surface layer is shallow (about 2mm)
2. The pores between the glass particles are difficult to get rid of, and the compactness is worse than that of the fusion method
3. The product is prone to deformation and has high requirements for refractory molds
The disadvantages are: 1. Long production cycle and high cost
2. Big environmental pollution
3. The gel shrinks greatly during sintering, and the product is easy to deform and crack

Method used

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  • Method for producing micro crystal glass
  • Method for producing micro crystal glass

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Experimental program
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Effect test

Embodiment 1

[0012] Select the formula of the base glass by weight percentage: SiO 2 41.87%, Al 2 o 3 9.62%, CaO 31.41%, Na 2 O 15.70%, Fe 2 o 3 0.07%, MgO 0.02%, K 2 O 1.28%, Li 2 O 0.03%; Weigh various raw materials according to the formula of the basic glass, and then mix them uniformly to obtain glass batch materials. After the glass batch materials are filled in a crucible, they are melted in a silicon-molybdenum rod electric furnace at a melting temperature of 1400 ° C and kept for 2 hours. A part of the melted glass liquid is made into water-tempered glass particles and then dried and classified. The particle gradation is 10 mesh to 80 mesh. The other part of the melted glass melt is mixed evenly to obtain the mother glass. Then the mother glass prepared by the particle melt mixing method is kept at 650±50°C for 2 hours to nucleate, and then the temperature is raised to 800±50°C for 15- 30min for crystallization. The results show that the glass-ceramics prepared by the par...

Embodiment 2

[0014] Select the formula of the base glass by weight percentage: SiO 2 57.02%, Al 2 o 3 13.10%, CaO 15.56%, Na 2 O 12.44%, Fc 2 o 3 0.07%, MgO 0.02%, K 2 O 1.75%, Li 2 O 0.04%; Weigh various raw materials according to the formula of the basic glass, and then mix them uniformly to obtain glass batch materials. After the glass batch materials are filled in a crucible, they are melted in a silicon-molybdenum rod electric furnace at a melting temperature of 1400 ° C and kept for 2 hours. A part of the melted glass liquid is made into water-tempered glass particles and then dried and classified. The particle gradation is 10 mesh to 80 mesh. The other part of the melted glass is mixed evenly to obtain the mother glass. Then, the mother glass prepared by the particle melt mixing method is kept at 900±50°C for 2 hours for nucleation, and then the temperature is raised to 1100±50°C for 15-30 minutes for crystallization. The results show that the glass-ceramics prepared by th...

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Abstract

The production process of devitrified glass includes a sintering process comprising compounding material, smelting, water quenching and sieving to grade, to produce water quenched glass grains; a melting process comprising compounding material, mixing and smelting to produce glass melt; mixing the water quenched glass grains with the glass melt; and subsequent conventional steps of forming, nucleation, crystallizing, polishing and cutting. Compared with available sintering process and melting process, the present invention has the advantages of raised overall re-crystallization capacity, shortened crystallization period, less pores in the product, etc. and is suitable for various glass production methods.

Description

Technical field [0001] The invention discloses a production method of glass-ceramics, which belongs to the technical field of glass materials and production. Background technique [0002] Glass-ceramics is a material in which the microcrystals and glass phases are uniformly distributed, which is made of the base glass through controlled crystallization behavior. Due to the combination of the excellent properties of glass and ceramics, glass-ceramic is widely used in electronics, chemical industry, biomedicine, mechanical engineering, military, construction and life as structural materials, technical materials, optical and electrical materials, building materials, and decorative materials. It has broad application prospects in various fields. At present, there are three methods for preparing glass-ceramics at home and abroad: melting method, sintering method and sol-gel method. The process of fusion method is to directly form the glass melt, and then undergo nucleation and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B32/00C03B32/02
CPCY02P40/57
Inventor 匡敬忠
Owner 匡敬忠
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