Crystallized glass
AssigneeNippon Electric Glass Co., Ltd.
InventorsTakahiro Matano, Yuki Yokota, Atsushi Tanaka, Tomonori Ichimaru, Yoshihisa Takayama, Ken Yuki
Life of this patent
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Abstract
A crystallized glass contains: from 58 to 70% of SiO2, from 15 to 30% of Al2O3, from 2 to 10% of Li2O, from 0 to 10% of Na2O, from 0 to 10% of K2O, from 0 to 15% of Na2O+K2O, from 0 to 15% of MgO+CaO+SiO+BaO+ZnO, from 0.1 to 6% of SnO2, from 0.5 to 6% of ZrO2, from 0 to 4% of TiO2, and from 0 to 6% of P2O5 in mass %, in which the crystallized glass has a degree of crystallinity of 1 to 95%, and an average visible light transmittance of 50% or greater at a thickness of 0.8 mm and a wavelength of 380 to 780 nm, and a compression stress layer is formed on a surface.
Claims14
A crystallized glass comprising:
- from 58 to 70% of SiO2, from 15 to 30% of Al2O3, from 2 to 10% of Li2O, from 0 to 10% of Na2O, from 0 to 10% of K2O, from 0 to 15% of Na2O+K2O, from 0 to 15% of MgO+CaO+SrO+BaO+ZnO, from 0.1 to 6% of SnO2, from 0.5 to 6% of ZrO2, from 0 to 4% of TiO2, and from 0 to 6% of P2O5 in mass %,
- wherein the crystallized glass has a crystallinity of 1 to 95% and an average visible light transmittance of 50% or greater at a thickness of 0.8 mm and a wavelength of 380 to 780 nm,
- a compression stress layer is formed on a surface, and
- a crystal of zirconia is precipitated.
A method for manufacturing a crystallized glass, the method comprising:
- preparing a crystallized glass containing from 58 to 70% of SiO2, from 15 to 30% of Al2O3, from 2 to 10% of Li2O, from 0 to 10% of Na2O, from 0 to 10% of K2O, from 0 to 15% of Na2O+K2O, from 0 to 15% of MgO+CaO+SrO+BaO+ZnO, from 0.1 to 6% of SnO2, from 0.5 to 6% of ZrO2, from 0 to 4% of TiO2, and from 0 to 6% of P2O5 in mass %, and having a crystallinity of 1 to 95%;
- and
- immersing the crystallized glass in a molten salt of 400° C. or higher to obtain a crystallized glass having a compression stress layer on a surface,
- wherein a crystal of zirconia is precipitated.
A method for manufacturing a crystallized glass, the method comprising:
- preparing a crystallized glass containing from 58 to 70% of SiO2, from 15 to 30% of Al2O3, from 2 to 10% of Li2O, from 0 to 10% of Na2O, from 0 to 10% of K2O, from 0 to 15% of Na2O+K2O, from 0 to 15% of MgO+CaO+SrO+BaO+ZnO, from 0.1 to 6% of SnO2, from 0.5 to 6% of ZrO2, from 0 to 4% of TiO2, and from 0 to 6% of P2O5 in mass %, and having a crystallinity of 40 to 95%;
- and
- immersing the crystallized glass in a molten salt of 500 to 1000° C. to obtain a crystallized glass having a compression stress layer on a surface,
- wherein a crystal of zirconia is precipitated.
A crystallized glass, wherein a crystal of zirconia is precipitated, and an average visible light transmittance is 50% or greater at a thickness of 0.8 mm and a wavelength of 380 to 780 nm.
Dependencies are inferred from the claim text.