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Preparation method of chemical tempered glass product

A chemically tempered glass and chemical tempering technology, applied in the field of glass, can solve the problems of uneven surface pressure of chemically tempered glass, and achieve the effect of not easy to crack, small difference in glass structure, and maintaining flatness

Inactive Publication Date: 2018-07-13
安徽晶晶玻璃制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent with the application number 201210186330.5 discloses "a processing method of chemical tempered glass", which uses the difference in volume of alkali ions to form embedded extrusion stress on the glass surface, and can obtain chemical tempering while maintaining flatness and improving impact height Glass, during production, the glass is ion-exchanged in potassium nitrate melt at 370-440°C for 5-8 hours, but potassium nitrate is often mixed with Ca 2+ , Mg 2+ Impurities such as ions are deposited on the surface of the glass during ion exchange, causing uneven pressure on the surface of the chemically tempered glass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a chemically tempered glass product, comprising the steps of:

[0022] (1) Keep the glass suitable for chemical tempering at 320°C for 8 hours, place it in molten metal salt, conduct ion exchange at 450°C for 3.5 hours, then slowly take out the glass and place it in an annealing furnace at 420°C , slowly cool down to 240°C at a rate of 4°C / min, keep warm for 45min, and then air cool to room temperature;

[0023] The metal molten salt is composed of the following raw materials in weight percentage: 70% of potassium nitrate, 27% of sodium nitrate and 3% of sodium humate.

[0024] (2) The glass surface is sprayed with a high-pressure water gun, and dried at 60°C.

[0025] Preferably, the glass is subjected to ion exchange at 445-450°C for 3.5h.

[0026] Preferably, the molten metal salt is composed of the following raw materials in weight percentage: 70% of potassium nitrate, 27% of sodium nitrate, and 3% of sodium humate.

Embodiment 2

[0028] A method for preparing a chemically tempered glass product, comprising the steps of:

[0029] (1) After holding the glass suitable for chemical tempering at 330°C for 7h, place it in molten metal salt, conduct ion exchange at 430°C for 4h, then slowly take out the glass and place it in an annealing furnace at 420°C, Slowly cool down to 230°C at a rate of 4.5°C / min, keep warm for 45 minutes, and then air cool to room temperature;

[0030] The molten metal salt is composed of the following raw materials in weight percentage: 75% of potassium nitrate, 23% of sodium nitrate, and 2% of sodium humate;

[0031] (2) The glass surface is sprayed with a high-pressure water gun, and dried at 65°C.

Embodiment 3

[0033] A method for preparing a chemically tempered glass product, comprising the steps of:

[0034] (1) Keep the glass suitable for chemical tempering at 330°C for 8 hours, place it in molten metal salt, conduct ion exchange at 445°C for 3.5 hours, then slowly take out the glass and place it in an annealing furnace at 420°C , slowly cool down to 230°C at a rate of 4°C / min, keep warm for 40 minutes, and then air cool to room temperature;

[0035] The above-mentioned glass suitable for chemical tempering contains the following components by weight percentage: SiO 2 65%, Al 2 o 3 7%, Li 2 O 4.5%, Na 2 O 13%, K 2 O 4.2%, MgO 2.8%, CaO 0.1%, Ba 2 o 3 0.5%, ZnO 1.5%, ZrO 2 0.8%, Sb 2 o 3 0.6%;

[0036] The metal molten salt is composed of the following raw materials in weight percentage: 70% of potassium nitrate, 27% of sodium nitrate and 3% of sodium humate.

[0037] (2) The glass surface is sprayed with a high-pressure water gun, and dried at 65°C.

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Abstract

The invention provides a preparation method of a chemical tempered glass product. The preparation method comprises the following steps: (1) after carrying out heat preservation on glass suitable for chemical tempering at the temperature of 300 to 330 DEG C for 6 to 8h, putting the glass into metal melted salt; carrying out ion exchange at 430 to 465 DEG C for 2.5 to 4h; then slowly taking out theglass and putting the glass into an annealing furnace at 400 to 420 DEG C; slowly cooling to 230 to 255 DEG C and carrying out heat preservation for 40 to 55min; then carrying out air cooling to roomtemperature, wherein the metal melted salt is prepared from the following raw materials in percentage by weight: 65 to 75 percent of potassium nitrate, 20 to 30 percent of sodium nitrate and 2 to 5 percent of sodium humate; (2) spraying and drying. According to the chemical tempered glass product prepared by the method, uniform surface-layer pressing stress can be formed on the surface of the glass; the glass has high evenness and is not easy to crack.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to a method for preparing a chemically tempered glass product. Background technique [0002] Chemical tempered glass is actually a kind of prestressed glass. In order to improve the strength of glass, chemical or physical methods are usually used to form compressive stress on the glass surface. Wind pressure resistance, cold and heat resistance, impact resistance, etc. [0003] Chemical tempered glass is manufactured by low-temperature ion exchange process. The so-called low-temperature system refers to the range where the exchange temperature is not higher than the glass transition temperature. Compared with the temperature range above the transition temperature and below the softening point of the high-temperature ion exchange process. The simple principle of the low-temperature ion exchange process is to exchange the ions with a smaller radius in the glass surface with the ions wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00C03C3/087
CPCC03C3/087C03C21/002
Inventor 倪明发许德章李怀正田民选
Owner 安徽晶晶玻璃制品有限公司
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