Title:
GLASS COMPOSITION FOR CHEMICAL REINFORCEMENT AND CHEMICALLY REINFORCED GLASS ARTICLE
Document Type and Number:
WIPO Patent Application WO/2022/004809
Kind Code:
A1
Abstract:
The present disclosure provides a glass composition for chemical reinforcement which has outstanding alkali resistance and is suitable in terms of both surface compressive stress and compressive stress layer depth. The glass composition according to the present disclosure contains, in terms of mol%, 60-80% SiO2, 1-5% Al2O3, 5-25% MgO, 0-5% CaO, 10-20% Na2O, and 0-10% K2O as components. By using this glass composition, it is possible to provide a chemically reinforced glass article having surface compressive stress in the range of 650-950 MPa and a compressive stress layer depth in the range of 7-17 µm, for example.
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Inventors:
KITAYAMA AKIRA (JP)
KURACHI JUNJI (JP)
KURACHI JUNJI (JP)
Application Number:
PCT/JP2021/024819
Publication Date:
January 06, 2022
Filing Date:
June 30, 2021
Export Citation:
Assignee:
NIPPON SHEET GLASS CO LTD (JP)
International Classes:
C03C3/083; C03C3/085; C03C3/087; C03C21/00
Domestic Patent References:
| WO2015163411A1 | 2015-10-29 | |||
| WO2015199150A1 | 2015-12-30 | |||
| WO2016002888A1 | 2016-01-07 |
Foreign References:
| JP2017078011A | 2017-04-27 | |||
| JP2017114718A | 2017-06-29 |
Other References:
M. B. VOLF: "Mathematical Approach to Glass (Glass Science and Technology", vol. 9, 1988, ELSEVIER SCIENCE LTD, pages: 169 - 174,289-292
Attorney, Agent or Firm:
KAMADA Koichi (JP)
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