Agc Inc.

Asahi Glass Company, Limited

Qing Li

Akio Koike

Seiki Ohara

Shusaku Akiba

Suguru Murayama

Yusuke Arai

Kenji Imakita

Eriko Maeda

Hitomi Furuta

Kazutaka Ono

Masamichi Tanida

Shigeki Sawamura

Takumi Umada

Kazuki Kanehara

Takanori Fukushi

Seigo Ohta

Hideki Numakura

The present invention relates to a glass ceramic having a three-dimensional shape including plural R-shapes including a smallest R-shape whose average radius of curvature is 5.0×10mm or less and a largest R-shape whose average radius of curvature is 1.0×10mm or more, having a maximum value of retardations of 20 nm/mm or less, and having a haze value converted into a value corresponding to a thickness of 0.8 mm of 1.0% or less in the largest R-shape.

Crystallized glass, chemically strengthened glass, and production method therefor

A glass sheet, containing, in mass % on an oxide basis: 45-70% of SiO, 1-15% of AlO, 10-25% of LiO, 0-10% of NaO, 0-5% of KO, and 0-15% of ZrO. KO/RO is 0.10 or less and ZrO/RO is 0.30 or more, where RO is a total content of LiO, NaO, and KO. The glass sheet has an average thermal expansion coefficient at 50° C.-350° C. of 90×10/° C.-140×10/° C. and a Young's modulus of 85 GPa or more.

Glass ceramics, chemically strengthened glass, and semiconductor substrate

The present invention provides crystallized glass of three-dimensional shape for easily producing chemically strengthened glass of three-dimensional shape that resists damage and has exceptional transparency. This crystallized glass of three-dimensional shape: contains crystals; has light transmittance in terms of a thickness of 0.8 mm of 80% or higher; and contains 45-74% SiO, 1-30% AlO, 1-25% LiO, 0-10% NaO, 0-5% KO, a total of 0-15% of SnOand/or ZrO, and 0-12% PO, these amounts expressing the oxide-based mass percentage.

Crystallized glass of three-dimensional shape, chemically strengthened glass of three-dimensional shape, and method for producing crystallized glass of three-dimensional shape and chemically strengthened glass of three-dimensional shape

The present invention relates to a chemically strengthened glass sheet in which a value of SB/(SA×t) is 5.0 mmor more, where SA (MPa·μm) is an integrated value of a compressive stress from a surface of the glass sheet to a depth of 10 μm, SB (MPa·μm) is an integrated value of a compressive stress from the depth of 10 μm to DOL which is a depth at which the compressive stress is zero, and t (mm) is a thickness of the glass sheet.

Chemically strengthened glass plate, and cover glass and electronic device comprising chemically strengthened glass

A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO, 13 to 18% of AlO, 0 to 5% of BO, 0.5 to 4% of PO, 4 to 10% of LiO, 5 to 14% of NaO, 0 to 2% of KO, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO, and 0 to 2% of ZrO. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO&#xd7;329+AlO&#xd7;786+BO&#xd7;627+PO&#xd7;(&#x2212;941)+LiO&#xd7;927+NaO&#xd7;47.5+KO&#xd7;(&#x2212;371)+MgO&#xd7;1230+CaO&#xd7;1154+SrO&#xd7;733+ZrO&#xd7;51.8, by using the contents in mole percentage on an oxide basis of components.

Chemically strengthened glass, and glass for chemical strengthening

The purpose of the present invention is to provide a chemically strengthened glass having excellent transparency and strength and being scratch resistant. The present invention pertains to a chemically strengthened glass that: has a compressive stress layer on the surface thereof; has a visible light transmittance of at least 70% when the thickness thereof is converted to 0.8 mm; has a surface compressive stress of at least 600 MPa; has a compressive stress depth of at least 80 &#x3bc;m; and contains a &#x3b2;-spodumene.

Chemically strengthened glass and production method therefor

The present invention pertains to a glass for strengthening, that: has an average transmittance of at least 70% when converted to a thickness of 0.8 mm at a wavelength of 380-780 nm; has a haze value of no more than 0.7% when converted to a thickness of 0.8 mm in a C light source; has a Young's modulus of at least 85 GPa; has a fracture toughness value of at least 0.90 MPa&#xb7;m; a thermal conductivity at 20&#xb0; C. of at least 1.3 W/m&#xb7;K; and comprises a lithium aluminosilicate crystallized glass.

Glass for chemical strengthening, chemically strengthened glass, and electronic device case

The present invention relates to a glass ceramic including crystals, and including, in mol % in terms of oxides: 65-75% of SiO; 3-6% of AlO; 15-25% of LiO; 0.2-4% of PO; 0.5-5% of ZrO; and 0.01-0.5% of HfO, in which the crystals include one or more kinds of crystals selected from the group consisting of &#x3b2;-spodumene crystals, petalite crystals, and eucryptite crystals.

Glass ceramic and chemically strengthened glass

A crystallized glass that: has a visible light transmittance of at least 85% when the thickness thereof is converted to 0.8 mm; has a haze value of no more than 1.0% when the thickness thereof is converted to 0.8 mm; contains, in terms of mass % on an oxide basis, 58%-70% SiO, 15%-30% AlO, 2%-10% LiO, 0%-5% NaO, 0%-2% KO, 0%-1.8% SrO, 0%-2% BaO, 0.5%-6% SnO, 0.5%-6% ZrO, and 0%-6% PO; has a total SrO and BaO content of 0.1%-3%; and has a total NaO and KO content of 1%-5%.

Crystallized glass and chemically strengthened glass

A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 72% of SiO, 7 to 18% of AlO, 1% or more of BO, 0 to 4% of PO, 5 to 16% of LiO, 0 to 7% of NaO, 0 to 2% of KO, 0 to 6% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO, and 0 to 2% of ZrO. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO&#xd7;329+AlO&#xd7;786+BO&#xd7;627+PO&#xd7;(&#x2212;941)+LiO&#xd7;927+NaO&#xd7;47.5+KO&#xd7;(&#x2212;371)+MgO&#xd7;1230+CaO&#xd7;1154+SrO&#xd7;733+ZrO&#xd7;51.8, by using the contents in mole percentage on an oxide basis of components.

A glass ceramic substrate includes: an inner layer part having a first thermal expansion coefficient; and a surface layer part having a second thermal expansion coefficient smaller than the first thermal expansion coefficient. The inner layer part contains a first glass matrix and flat alumina particles. The flat alumina particles are dispersed in the glass matrix in a direction in which individual thickness directions are substantially perpendicular to a surface direction of one of main surfaces of the inner layer part. Further, a mean aspect ratio of the flat alumina particles is 3 or more in one of cross sections along the thickness directions of the flat alumina particles out of cross sections of the inner layer part.

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Tokyo, Japan

Qing Li