Crystallized glass
AssigneeNippon Electric Glass Co., Ltd.
InventorsTomonori ICHIMARU, Ken YUKI
Life of this patent
Estimating the term…
Abstract
To provide a crystallized glass having high strength, a high transmittance, and high impact resistance. A crystallized glass according to the present invention includes a compression stress layer formed by ion exchange, in which the crystallized glass contains, as a composition, in mol %, from 50% to 80% of SiO2, from 0% to 4.8% of Al2O3, from 0.2% to 15% of P2O5, from 1.5% to 30% of Li2O, from 0% to 15% of Na2O, and from 1.5% to 10% of ZrO2, and the crystallized glass has a portion in which a Na ion concentration decreases from a surface side to an inner side of the glass.
Claims11
A crystallized glass comprising:
- a compression stress layer formed by ion exchange, wherein
- the crystallized glass comprises, as a composition, in mol %, from 50% to 80% of SiO2, from 0% to 4.8% of Al2O3, from 0.2% to 15% of P2O5, from 1.5% to 30% of Li2O, from 0% to 15% of Na2O, and from 1.5% to 10% of ZrO2, and
- the crystallized glass has a portion where a Na ion concentration decreases from a surface side to an inner side of the glass.
A crystallized glass comprising:
- a compression stress layer formed by ion exchange, wherein
- at least one of lithium disilicate and lithium metasilicate is precipitated, and
- the crystallized glass has a portion where a Na ion concentration decreases from a surface side to an inner side of the glass.
A crystallized glass comprising:
- a compression stress layer formed by ion exchange, wherein
- the crystallized glass comprises, as a composition, in mol %, from 50% to 80% of SiO2, from 0% to 4.8% of Al2O3, from 0.2% to 15% of P2O5, from 1.5% to 30% of Li2O, from 0% to less than 3.8% of Na2O+K2O, from 0% to less than 3.8% of Na2O, from 0% to less than 3.8% of K2O, and from 1.5% to 10% of ZrO2.
A crystalline glass comprising, as a glass composition, in mol %, from 50% to 80% of SiO2, from 0% to 4.8% of Al2O3, from 0.2% to 15% of P2O5, from 1.5% to 30% of Li2O, from 0% to less than 3.8% of Na2O+K2O, from 0% to less than 3.8% of Na20, from 0% to less than 3.8% of K2O, and from 1.5% to 10% of ZrO2.
A crystalline glass comprising, as a glass composition, in mol %, from 50% to 80% of SiO2, from 0% to 4.8% of Al2O3, from 0.2% to 15% of P2O5, from 1.5% to 30% of Li2O, from 0% to 15% of Na2O, and from 1.5% to 10% of ZrO2.
Dependencies are inferred from the claim text.