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Chemical strengthening method, chemical strengthening apparatus, and chemically strengthened glass

A technology for strengthening glass and glass, which is applied in the field of chemical strengthening method, chemical strengthening glass, and chemical strengthening device, and can solve the problems of increased production cost, limited adjustment ability, excessive polishing waste liquid, etc.

Inactive Publication Date: 2020-06-26
LILING KIBING ELECTRONIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, after the glass is strengthened and then ground, the production cost increases, and more polishing waste liquid will be generated, which is not conducive to environmental protection; the cooling rate of the glass air surface and the tin liquid surface during the annealing process is adjusted by blasting, due to insufficient precision, limited ability to adjust

Method used

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  • Chemical strengthening method, chemical strengthening apparatus, and chemically strengthened glass
  • Chemical strengthening method, chemical strengthening apparatus, and chemically strengthened glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Strengthening process:

[0052] (1) Preheat to 360°C for 1 hour and hold for 15 minutes;

[0053] (2) Conduct a salt bath at 420°C for 5 hours; after the salt bath is over, lift the original glass sheet and drop salt for 12 minutes;

[0054] (3) Anneal and cool from 360°C to 150°C within 1.5h, no electric field is applied during the annealing process.

[0055] Test results:

[0056] Air surface: CS 850MPa DOL 43.5μm

[0057] Tin liquid level: CS 852MPa DOL 42.7μm

[0058] Warpage: 0.22mm.

Embodiment 2

[0060] Strengthening process:

[0061] (1) Preheat to 360°C for 1 hour and hold for 15 minutes;

[0062] (2) Conduct a salt bath at 420°C for 5 hours; after the salt bath is over, lift the original glass sheet and drop salt for 12 minutes;

[0063] (3) Anneal and cool from 360°C to 150°C within 1.5h, and apply an electric field during the annealing process; the magnitude of the electric field is 200V / cm, the action temperature is 360°C, and the action time is 30min.

[0064] Test results:

[0065] Air surface: CS 820MPa DOL 43.8μm

[0066] Tin liquid level: CS 861MPa DOL 42.1μm

[0067] Warpage: 0.05mm.

Embodiment 3

[0069] Strengthening process:

[0070] (1) Preheat to 360°C for 1 hour and hold for 15 minutes;

[0071] (2) Conduct a salt bath at 420°C for 5 hours; after the salt bath is over, lift the original glass sheet and drop salt for 12 minutes;

[0072] (3) Anneal and cool from 360°C to 150°C within 1.5h, apply an electric field during the annealing process, the magnitude of the electric field is 200V / cm, the action temperature is 320°C, and the action time is 30min.

[0073] Test results:

[0074] Air surface: CS 838MPa DOL 43.7μm

[0075] Tin liquid level: CS 857MPa DOL 42.4μm

[0076] Warpage: 0.14mm.

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Abstract

The invention discloses a chemical strengthening method, a chemical strengthening device and chemically strengthened glass, and the chemical strengthening method comprises the following steps: preheating a raw glass sheet; carrying out chemical strengthening on the preheated raw glass sheet; and annealing the chemically strengthened raw glass sheet, and applying an external electric field in the annealing process, the direction of the external electric field being perpendicular to the raw glass sheet, and the direction of the external electric field being from the air surface to the tin liquidsurface. The chemical strengthening method provided by the invention can effectively inhibit warping of the strengthened glass.

Description

technical field [0001] The invention relates to the field of glass production, in particular to a chemical strengthening method, a chemical strengthening device and chemical strengthening glass. Background technique [0002] In recent years, electronic information products such as tablet computers, smart phones, and car screens have basically become displays with touch panels. There is a layer of protective glass on the outermost layer of the display, also known as cover glass. At present, the method of increasing the mechanical properties of the cover glass is mainly the low-temperature ion exchange chemical strengthening method. + ) is also a large monovalent cation (such as K + ), and glass surface alkali ions (such as Na + ) exchanged so that K + Entering the glass surface, a certain stress intensity and stress depth are formed on the glass surface. [0003] When the float glass is formed, one side of the glass is in contact with the air, which is the air surface, an...

Claims

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Application Information

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IPC IPC(8): C03C21/00C03B25/00
CPCC03B25/00C03C21/002
Inventor 熊圣安王海雄谢图功孙志强
Owner LILING KIBING ELECTRONIC GLASS CO LTD
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