Ultralow-expansion coefficient high transparent glass-ceramics and method for producing its product

A high-transparency, glass-ceramic technology, which is applied in the production of ultra-low expansion coefficient, high-transparency glass-ceramics and its products, can solve the problems of undiscovered production methods of heat-resistant vessels, and achieve low expansion coefficient and short crystallization time , The effect of high heat shock temperature

Active Publication Date: 2008-03-12
广东科迪微晶玻璃实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the glass-ceramics disclosed in the patent literature are architectural decorative materials and wall-mounting or handicraft products. At present, various heating products produced by transparent glass-ceramics have not been found in the market, such as used in induction cookers, microwave ovens, gas stoves, Production method of products such as heating plates for fireplaces, baking plates, and various heat-resistant utensils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Embodiment: 1, the production method of ultra-low expansion coefficient high transparency glass-ceramic heating plate, its technological process comprises:

[0027] (1) Ingredients, the weight percentages of various raw and auxiliary materials are:

[0028] Li 2 O: 4.3%; Al 2 o 3 : 21.4%; SiO 2 : 65%; MgO: 0.4%; K 2 O: 0.2%; Na 2 O: 0.3%; BaO: 1.1%; ZrO 2 : 1.8%; TiO 2 : 2.4%; P 2 o 5 : 1.3%; Y 2 o 3 : 0.3%; Sb 2 o 3 : 1.0%; NaCl: 0.5%. Plus NH 4 NO 3 : 1.5%, Al 2 o 3 / SiO 2 = 0.33.

[0029] (2) mixing; (3) melting: 55M 2 The melting temperature of the cross-flame heavy oil pool furnace is 1630°C; (4) cooling: 1440-1460°C; (5) calendering (continuous), the temperature is 1410-1420°C; (6) annealing: continuous annealing furnace (roller table (7) cutting board (automatic cutting board): automatically cut into boards according to the required size; (8) crystallization treatment, crystallization in a continuous automatic roller-type crystallization furn...

Embodiment 2

[0031] Embodiment 2: the production method of ultra-low coefficient of expansion and high transparency glass-ceramic heating plate, its technological process comprises:

[0032] (1) Ingredients, the weight percentages of various raw and auxiliary materials are:

[0033] Li 2 O: 3.9%; Al 2 o 3 : 21.0%; SiO 2 : 66.0%; MgO: 0.6%; K 2 O: 0.15%; Na 2 O: 0.3%; BaO: 1.1%; ZrO 2 : 1.65%; TiO 2 : 2.4%; P 2o 5 : 1.3%; Y 2 o 3 : 0.3%; Sb 2 o 3 : 0.8%; NaCl: 0.5%. Plus NH 4 NO 3 : 1.5%, Al 2 o 3 / SiO 2 = 0.32.

[0034] (2) mixing; (3) melting: 55M 2 The melting temperature of the cross-flame heavy oil tank furnace is 1630°C; (4) Cooling: 1440-1460°C; (5) Using corresponding molds and equipment, compression molding, or blow molding, the temperature is 1420-1440°C; ( 6) Annealing: temperature 710°C; (7) crystallization treatment, 710°C × 40 minutes to 850°C × 60 minutes, at this time the color of the glass plate is transparent and very light brown; (8) trimming; (9) ins...

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Abstract

The present invention relates to a Li2O-Al2O3-SiO2 system ultra-low expansion coefficient high-transparency glass-ceramic and production method of the products. Calculated by weight percentage, the ultra-low expansion coefficient high-transparency glass-ceramic is composed of 3.2 to 4.6 percent of Li2O, 18.0 to 23.6 percent of Al2O3, 64.1 to 69.4 percent of SiO2, 0.3 to 0.8 percent of MgO, 0.8 to 2.5 percent of BaO, 0.3 to 0.8 percent of R2O, 0.01 to 0.4 percent of Y2O3, 1.8 to 2.5 percent of TiO2, 1.6 to 2.4 percent of ZrO2, 1.1 to 1.8 percent of P2O5, 0.6 to 1.5 percent of Sb2O3, 0.3 to 1.0 percent of NaCl and 1.0 to 2.0 percent of NH4NO3. The heat-resistant glass plates and heat-resistant glass products can be manufactured by using the formula and the corresponding forming die. The present invention has the advantages that the production technique is simple, the produced products have low expansion coefficient, good transparency, high thermal impact temperature, high strength, have constant transparency when being used under the temperature of 700 Celsius system for a long time, the products have long service life, etc.

Description

Technical field: [0001] The present invention relates to Li 2 O-Al 2 o 3 -SiO 2 It is a composition of ultra-low expansion coefficient high-transparency glass-ceramics and a production method of its products. Background technique: [0002] There are many types of glass-ceramics, and glass products for different purposes can be produced by different composition ratios and different processes. Most of the glass-ceramics disclosed in the patent literature are architectural decorative materials and wall-mounting or handicraft products. At present, various heating products produced by transparent glass-ceramics have not been found in the market, such as used in induction cookers, microwave ovens, gas stoves, The production method of products such as heating plates for fireplaces, baking plates and various heat-resistant utensils. Invention content: [0003] The purpose of the present invention is to improve the existing glass-ceramic formula, and provide a heating plate, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14C03B32/02
Inventor 赵天佑庄堆业蔡来吉庄伟兴
Owner 广东科迪微晶玻璃实业有限公司
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