Title:
LOW WARPING TEMPERED MICROCRYSTALLINE GLASS, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/041067
Kind Code:
A1
Abstract:
A low warping tempered microcrystalline glass, a preparation method therefor and application thereof. The microcrystalline glass has a compressive stress layer extending from a surface to an interior of the glass, a compressive stress at the surface of the glass being CS<550 MPa, and the compressive stress layer having the following stress distribution: (a) when a depth of the stress layer is 0 μm≤Dol<30 μm, a stress distribution curve is approximately linear, and an absolute value of a slope k1 of the stress curve between any two points that are 20 μm apart on the curve satisfies 2.45<|k1|<5.05; (b) when the depth of the stress layer is 30 μm≤Dol≤Dol_zero, the stress distribution curve is approximately linear, and an absolute value of a slope k2 of the stress curve between any two points that are 20 μm apart on the curve satisfies 1≤|k2|≤1.5. By means of using the stress distribution of the described structure, a warping problem of the present tempered microcrystalline glass caused by a large stress gradient after tempering can be significantly improved.
Inventors:
TAN BAOQUAN (CN)
HU WEI (CN)
ZHANG YANQI (CN)
JIANG HONG (CN)
HU WEI (CN)
ZHANG YANQI (CN)
JIANG HONG (CN)
Application Number:
PCT/CN2022/119442
Publication Date:
March 23, 2023
Filing Date:
September 16, 2022
Export Citation:
Assignee:
CHONGQING AUREAVIA HI TECH GLASS CO LTD (CN)
International Classes:
C03C10/04; C03B32/02; C03C10/02; C03C10/12; C03C10/14; C03C21/00
Domestic Patent References:
| WO2021095917A1 | 2021-05-20 |
Foreign References:
| CN113754289A | 2021-12-07 | |||
| CN105948536A | 2016-09-21 | |||
| CN112789253A | 2021-05-11 | |||
| CN112645588A | 2021-04-13 | |||
| CN110002743A | 2019-07-12 | |||
| CN112512985A | 2021-03-16 | |||
| US20150368153A1 | 2015-12-24 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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