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A surface-strengthened clear glass

A technology of transparent glass and surface strengthening, which is applied in glass forming, glass manufacturing equipment, manufacturing tools, etc., and can solve the problems of surface strengthening induced by cooling spontaneous crystallization

Active Publication Date: 2021-04-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report on a glass manufacturing method that utilizes glass melt cooling to induce surface strengthening due to spontaneous crystallization

Method used

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  • A surface-strengthened clear glass
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The parts by weight of raw materials used consist of:

[0021] 67.68 parts of quartz powder, 1.55 parts of aluminum hydroxide, 3.57 parts of boric acid, 19.00 parts of sodium carbonate, 12.66 parts of magnesium oxide, 3.61 parts of calcium carbonate, and 7.33 parts of sodium fluorosilicate.

[0022] The weight percent (wt%) of the active ingredient of raw material used is:

[0023] SiO 2 67, Al 2 o 3 1.0, B 2 o 3 2.0, Na 2 O 11.0, MgO 12.6, CaO 2.0, F 4.4.

[0024] The concrete steps of manufacturing method are as follows:

[0025] (1) After mixing the above raw materials evenly, heat them in a silicon-molybdenum rod electric furnace at 1520°C for 2 hours to prepare a uniform molten glass;

[0026] (2) Cast the molten glass in a heat-resistant cast iron mold with a preheating temperature of 800°C, then keep it in a muffle furnace at 800°C for 20 minutes, then cool to 520°C at a rate of 2°C / min and anneal for 30 minutes Stop heating, and cool down to room tem...

Embodiment 2

[0029] The parts by weight of raw materials used consist of:

[0030] 64.60 parts of quartz powder, 2.32 parts of aluminum hydroxide, 4.46 parts of boric acid, 21.59 parts of sodium carbonate, 12.26 parts of magnesium oxide, 5.41 parts of calcium carbonate, and 7.25 parts of sodium fluorosilicate.

[0031] The weight percent (wt%) of the active ingredient of raw material used is:

[0032] SiO 2 63.95, Al 2 o 3 1.50, B 2 o 3 2.00, Na 2 O 12.50, MgO 12.20, CaO 3.00, F 4.35.

[0033] The specific steps of the manufacturing method are as follows:

[0034] After mixing the above raw materials evenly, heat them in a silicon-molybdenum rod electric furnace at 1510°C for 2 hours to obtain a uniform molten glass;

[0035] (2) Cast the molten glass in a heat-resistant cast iron mold with a preheating temperature of 780°C, then keep it in a muffle furnace at 780°C for 20 minutes, then cool it to 520°C at a rate of 2°C / min and anneal for 30 minutes Stop heating, and cool down ...

Embodiment 3

[0038] The parts by weight of raw materials used consist of:

[0039] 62.63 parts of quartz powder, 3.09 parts of aluminum hydroxide, 5.36 parts of boric acid, 22.46 parts of sodium carbonate, 12.26 parts of magnesium oxide, 6.22 parts of calcium carbonate, and 7.25 parts of sodium fluorosilicate.

[0040]The weight percent (wt%) of the active ingredient of raw material used is:

[0041] SiO 2 62.00, Al 2 o 3 2.00, B 2 o 3 3.00, Na 2 O 13.00, MgO 12.20, CaO 3.45, F 4.35.

[0042] The specific steps of the manufacturing method are as follows:

[0043] (1) After mixing the above raw materials evenly, heat them in a silicon-molybdenum rod electric furnace at 1505°C for 2 hours to obtain a uniform molten glass;

[0044] (2) Cast the molten glass in a heat-resistant cast iron mold with a preheating temperature of 780°C, then keep it in a muffle furnace at 780°C for 20 minutes, then cool to 500°C at a rate of 2°C / min and anneal for 30 minutes Stop heating, and then cool ...

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Abstract

The invention discloses a surface strengthened transparent glass. The present invention is prepared through the following steps: (1) Use quartz sand, aluminum hydroxide, soda ash, magnesium oxide, calcium carbonate and sodium fluorosilicate as raw materials, mix the above raw materials evenly, and keep warm at 1480-1520°C for 2 (2) Cast the molten glass in a preheated heat-resistant cast iron mold, then keep it at 750-800°C for 20 minutes, and then cool it to 500-520°C at a rate of 2°C / min After annealing for 30 minutes, stop heating and cool to room temperature to obtain a glass with a crystal layer on the surface; (3) Polish the glass obtained in step (2) to remove the crystals on the surface to obtain a surface-strengthened transparent glass. The invention utilizes the glass melt to cool and spontaneously devitrify to induce surface strengthening to prepare surface-strengthened transparent glass, and the transparent glass has good surface-strengthening performance.

Description

technical field [0001] The invention relates to the technical field of new glass materials, in particular to a surface-strengthened transparent glass. Background technique [0002] Glass materials have been widely used in various fields of production and life. Its most important property is high light transmission, which can be used in glass windows, lenses, prisms, and optical fibers for high-speed transmission. However, glass is a brittle material, and its actual strength is far lower than the theoretical strength. Therefore, people usually use tempering methods to increase its strength, that is, a compressive stress layer is formed on the glass surface. When the glass is subjected to external force, the pressure layer Part of the tensile stress can be offset to avoid glass breakage, so as to achieve the purpose of improving glass strength. Tempering treatment includes physical tempering and chemical tempering. Among them, physical tempering is to cut ordinary annealed gl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C6/06C03C6/04C03B19/02C03B25/00B24B19/22
CPCB24B19/22C03B19/02C03B25/00C03C1/00
Inventor 刘树江吴家雄
Owner QILU UNIV OF TECH
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