Method for producing reinforced glass, reinforced glass and electronic device

Patent metadata

Field	Value
Publication number	US-11242282-B2
Application number	US-201816131112-A
Country	US
Kind code	B2
Filing date	Sep 14, 2018
Priority date	Dec 29, 2017
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A method for producing reinforced glass, reinforced glass and an electronic device are provided. The method for producing reinforced glass includes: subjecting glass to a first reinforcing treatment; detecting a first stress parameter of the glass subjected to the first reinforcing treatment, and determining whether the glass subjected to the first reinforcing treatment is qualified according to the first stress parameter; subjecting the glass to a second reinforcing treatment when the glass subjected to the first reinforcing treatment is qualified; detecting a second stress parameter of the glass subjected to the second reinforcing treatment, and determining whether the glass subjected to the second reinforcing treatment is qualified according to the second stress parameter; and subjecting the glass to a touch-polishing treatment when the glass subjected to the second reinforcing treatment is qualified, so as to obtain the reinforced glass.

First claim

What is claimed is:

1. A method for producing reinforced glass, comprising:
subjecting glass to a first reinforcing treatment, and measuring a compressive stress value at knee point, such that the glass after the first reinforcing treatment has the compressive stress value at knee point greater than a preset compressive stress value at knee point, where the preset compressive stress value at knee point is 10 to 25 MPa greater than a target compressive stress value at knee point of the reinforced glass;
subjecting the glass after the first reinforcing treatment to a second reinforcing treatment, and measuring a second surface compressive stress value, such that the glass after the second reinforcing treatment has the second surface compressive stress value greater than a second preset surface compressive stress value, where the second preset surface compressive stress value is 30 to 80 MPa greater than a target surface compressive stress value of the reinforced glass; and
subjecting the glass after the second reinforcing treatment to a touch-polishing treatment, so as to obtain the reinforced glass, comprising:
adjusting parameters of the touch-polishing treatment such that a compressive stress cutting value at a bottom of the reinforced glass subjected to the touch-polishing treatment is not less than that at a front of the reinforced glass and controlling the compressive stress cutting value at the front of the reinforced glass to be 40 to 60 MPa.

2. The method according to claim 1 , further comprising: discharging the glass subjected to the first reinforcing treatment from a furnace, and subjecting the glass subjected to the first reinforcing treatment to a cooling treatment when discharging the glass from the furnace.

3. The method according to claim 1 , further comprising: adding anhydrous trisodium phosphate to a reinforcing solution of the first reinforcing treatment when at least one of the following conditions is met:
a difference between a first surface compressive stress value after the first reinforcing treatment and a first preset surface compressive stress value is not greater than 10% of the first preset surface compressive stress value;
a difference between the compressive stress value at knee point and a preset compressive stress value at knee point is not greater than 10% of the preset compressive stress value at knee point.

4. The method according to claim 3 , further comprising: subjecting the glass subjected to the first reinforcing treatment to a first cleaning treatment.

5. The method according to claim 4 , wherein the first cleaning treatment lasts for 80 to 150 min.

6. The method according to claim 1 , further comprising: discharging the glass subjected to the second reinforcing treatment from a furnace, and subjecting the glass subjected to the second reinforcing treatment to a cooling treatment when discharging the glass from a furnace.

7. The method according to claim 1 , further comprising: subjecting the glass subjected to the second reinforcing treatment to a second cleaning treatment.

8. The method according to claim 7 , wherein the second cleaning treatment lasts for 60 to 100 min.

9. The method according to claim 1 , wherein the difference between the compressive stress cutting value at the bottom of the reinforced glass and that at the front of the reinforced glass is controlled to be less than 30 MPa.

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Wang Xiaowei

Classifications

• C03C19/00

  Surface treatment of glass, not in the form of fibres or filaments, by mechanical means (sand-blasting, grinding, or polishing glass B24) · CPC title

• B24B7/241

  Methods · CPC title

• B24B1/00

  Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes · CPC title

• B24B7/17

  for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders · CPC title

• C03C21/002 Primary

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title