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Chemically strengthened glass and production method therefor

A technology for strengthening glass and crystallized glass, applied in chemical instruments and methods, glass/slag layered products, layered products, etc., can solve the problems of crystallized glass with poor transparency, achieve excellent transparency and mechanical strength, Excellent effect of transparency and strength

Pending Publication Date: 2020-04-03
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, crystallized glass is not as transparent as amorphous glass

Method used

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  • Chemically strengthened glass and production method therefor
  • Chemically strengthened glass and production method therefor
  • Chemically strengthened glass and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0154] Hereinafter, the present invention will be described using examples, but the present invention is not limited thereto. Examples 1 to 11 and Examples 18 to 25 are examples, and Examples 12 to 17 are comparative examples.

[0155] Glass raw materials were prepared so that the glass composition shown by the mass % of an oxide basis in Table 1-Table 3 was obtained, and it weighed so that 800g of glass could be obtained. Next, the mixed glass raw materials were put into a platinum crucible, put into an electric furnace at 1500° C. to 1700° C., and melted for about 5 hours for degassing and homogenization.

[0156] The resulting molten glass was poured into a mold, kept at the glass transition temperature for 1 hour, and then cooled to room temperature at a rate of 0.5° C. / minute to obtain a glass block. Among them, regarding the glass 1, a plurality of glass blocks were prepared.

[0157] (glass transition temperature)

[0158] Based on JIS R1618:2002, the thermal expansi...

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Abstract

The purpose of the present invention is to provide a chemically strengthened glass having excellent transparency and strength and being scratch resistant. The present invention pertains to a chemically strengthened glass that: has a compressive stress layer on the surface thereof; has a visible light transmittance of at least 70% when the thickness thereof is converted to 0.8 mm; has a surface compressive stress of at least 600 MPa; has a compressive stress depth of at least 80 microns; and contains a beta-spodumene.

Description

technical field [0001] The present invention relates to chemically strengthened glass and its manufacturing method Background technique [0002] Chemically strengthened glass is used for cover glass of portable terminals, etc. [0003] Chemically strengthened glass is glass in which ion exchange occurs between alkali metal ions in the glass and alkali metal ions in the molten salt by, for example, bringing the glass into contact with a molten salt containing alkali metal ions, forming a pressure bond on the surface of the glass. Stress layer of glass. [0004] Crystallized glass is glass in which crystals are precipitated. Compared with amorphous glass that does not contain crystals, crystallized glass is harder and less likely to be damaged. Patent Document 1 describes an example in which crystallized glass is chemically strengthened by ion exchange treatment. However, crystallized glass is inferior to amorphous glass in terms of transparency. [0005] Patent Document 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/12C03B32/02C03C21/00
CPCC03B32/02C03C21/002C03C10/0027C03C3/083C03C3/085C03C3/091C03C3/097C03C4/0028C03C4/18C03C10/0054C03C2204/00B32B17/10
Inventor 李清今北健二小池章夫前田枝里子
Owner AGC INC