- 专利标题: GLASSES AND GLASS CERAMICS INCLUDING A METAL OXIDE CONCENTRATION GRADIENT
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申请号: US17024203申请日: 2020-09-17
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公开(公告)号: US20210002167A1公开(公告)日: 2021-01-07
- 发明人: Guangli Hu , Charlene Marie Smith , Zhongzhi Tang , Steven Alvin Tietje
- 申请人: CORNING INCORPORATED
- 申请人地址: US NY Corning
- 专利权人: CORNING INCORPORATED
- 当前专利权人: CORNING INCORPORATED
- 当前专利权人地址: US NY Corning
- 主分类号: C03C21/00
- IPC分类号: C03C21/00 ; C03C23/00 ; C03C10/00 ; C03C3/093 ; C03C3/091 ; C03C3/097
摘要:
A glass-based article may include from about 45 mol. % to about 80 mol. % SiO2; from about 0 mol. % to about 10 mol. % Na2O; less than about 5 mol. % K2O; a non-zero amount of Al2O; and an amorphous phase and a crystalline phase. The article may further in include a stress profile comprising a surface compressive stress (CS) and a maximum central tension (CT). A ratio of Li2O (mol. %) to R2O (mol. %) in the article is from about 0.5 to about 1, where R2O is the sum of Li2O, Na2O, and K2O in the article. CT may be greater than or equal to about 50 MPa and less than about 100 MPa. CS may be greater than 2.0·CT. A depth of compression (DOC) of the stress profile may be greater than or equal to 0.14·t and less than or equal to 0.25·t, where t is the thickness of the article.
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