Asahi Glass Company, Limited

Agc Inc.

Kenji Imakita

Suguru Murayama

Kazuki Kanehara

Akio Koike

Naoki Sugimoto

Nobuhiro Nakamura

Kazutaka Hayashi

Hiroyuki Ohkawa

Izuru Kashima

Qing Li

Eriko Maeda

Yasuko Osaki

Takumi Umada

Nao Ishibashi

Hidefumi Odaka

Yusuke Arai

Kazuo Watanabe

Jun Sasai

Katsuyoshi Nakayama

Toshihisa Okada

Akihiro Hishinuma

Hiroyuki Yamamoto

Hideaki Hayashi

Yuki Kondo

Hitoshi Onoda

Motoshi Ono

Masamichi Tanida

Satoshi Ogami

Satoshi Fujimine

Satoru Tomeno

Shiro Ohtaki

Hiroyuki Okawa

Shinji Honda

Shingo Urata

Makoto Katsuta

Kazuyoshi Orihara

Takashi Ootsuki

Rui Yanagawa

The present invention relates to a glass including, in mole percentage in terms of oxides: 40-65% of SiO; 25-40% of AlO; and 7-15% of one or more components, in total, selected from YO, LaO, NbO, TaO, and WO. Also the present invention relates to a chemically strengthened glass having a base composition including, in mole percentage in terms of oxides: 40-65% of SiO; 25-40% of AlO; 7-15% of YO; and 2-15% of LiO, and having a compressive stress value, measured at a depth of 50 μm from a surface thereof, of 150 MPa or more.

Glass, chemically tempered glass, and method for producing same

A plate-like chemically strengthened glass having a compression stress layer on the surface of the glass, wherein the compressive stress value (CS) at the glass surface of is 500 MPa or more, the plate thickness (t) is 400 μm or more, the compressive stress depth of layer (DOL) is (t×0.15) μm or more, the compressive stress values (CS) and (CS) when the depth from the glass surface is ¼ and ½, respectively, are 50 MPa or more, mexpressed by {m=(CS−CS/(DOL/4−DOL/2)} is −1.5 MPa/μm or more, mexpressed by {m=(CS/(DOL/2−DOL)} is 0 MPa/μm or less, and mis less than m.

Chemically strengthened glass, method for producing same, and glass for chemical strengthening

The present invention relates to a chemically strengthened glass satisfying A[MPa] of 600 or more, A[MPa] of 50 or more, B[μm] of 6 or less, B[μm] of 10% or more of t [μm], C [MPa] of −30 or less, and A/B[MPa/μm] of 100 or more when the chemically strengthened glass has a thickness t [μm] and a profile of a stress value [MPa] at a depth×[μm] from a glass surface is approximated by an error least-squares method in a region of 0<x<3t/8 using the following function while defining a compressive stress as positive and a tensile stress as negative: Aerfc(x/B)+Aerfc(x/B)+C, in which erfc is a complementary error function, and relations of A>Aand B<Bare satisfied.

Chemically strengthened glass

An inference method includes inferring a value that includes a stress value in a region located 50 μm or shallower from a surface of a chemically strengthened glass, by receiving as input at least a temperature and a time used upon chemical strengthening, and stress values at three or more different depth positions 20 μm or deeper from the surface of the chemically strengthened glass that has been obtained by chemically strengthening a glass having a thickness of 0.2 mm or greater with the temperature and the time.

Inference method, quality control method, chemically strengthened glass, inference program, storage medium, inference device, and method of manufacturing chemically strengthened glass

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

A chemically strengthened glass article in which a compressive stress value on a first surface is 400 MPa or more, a compressive stress value at a depth Dwith a maximum compressive stress value in the range (0.05×t)−(0.15×t) μm is larger than the compressive stress value at a depth Dwith a minimum compressive stress value in the range from the first surface to D, a tensile stress value at a depth of (0.5×t) μm is 125 MPa or less, and a compressive stress layer depth is (0.23×t) μm or more.

Chemically strengthened glass article and manufacturing method thereof

The present invention relates to a chemically strengthened glass having a sheet shape, having a compressive stress layer on a glass surface, having a compressive stress value on the glass surface of 800 MPa or more, having a sheet thickness (t) of 100 μm or more, having a depth of the compressive stress layer (DOL) of (t×0.1) μm or more, and satisfying: CS>CS>0, where Dis a depth in a range of 10 μm or more and not more than DOL from the glass surface, at which a compressive stress value is maximum; CSis the compressive stress value at the depth D; Dis a depth in a range of equal to or less than Dfrom the glass surface, at which a compressive stress value is minimum; and CSis the compressive stress value at the depth D.

Chemically strengthened glass and method for producing same

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

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 relates to a chemically strengthened glass satisfying A[MPa] of 600 or more, A[MPa] of 50 or more, B[&#x3bc;m] of 6 or less, B[&#x3bc;m] of 10% or more of t [&#x3bc;m], C [MPa] of &#x2212;30 or less, and A/B[MPa/&#x3bc;m] of 100 or more when the chemically strengthened glass has a thickness t [&#x3bc;m] and a profile of a stress value [MPa] at a depth x [&#x3bc;m] from a glass surface is approximated by an error least-squares method in a region of 0&#x3c;x&#x3c;3t/8 using the following function while defining a compressive stress as positive and a tensile stress as negative: Aerfc(x/B)+Aerfc(x/B)+C, in which erfc is a complementary error function, and relations of A&#x3e;Aand B&#x3c;Bare satisfied.

A plate-like chemically strengthened glass having a compression stress layer on the surface of the glass, wherein the compressive stress value (CS) at the glass surface of is 500 MPa or more, the plate thickness (t) is 400 &#x3bc;m or more, the compressive stress depth of layer (DOL) is (t&#xd7;0.15) &#x3bc;m or more, the compressive stress values (CS) and (CS) when the depth from the glass surface is &#xbc; and &#xbd;, respectively, are 50 MPa or more, mexpressed by {m=(CS&#x2212;CS/(DOL/4&#x2212;DOL/2)} is &#x2212;1.5 MPa/&#x3bc;m or more, mexpressed by {m=(CS/(DOL/2&#x2212;DOL)} is 0 MPa/&#x3bc;m or less, and mis less than m.

A glass ball has a density of 2.3 to 3.2 g/cm, a Young's modulus of 60 to 150 GPa, and an average coefficient of thermal expansion at 50 to 350&#xb0; C. being 40&#xd7;10to 120&#xd7;10/&#xb0; C. The glass ball is formed of a glass material including, as represented by mole percentage based on oxides, 30 to 75 mol % of SiO, 2 to 30 mol % of AlO, and 5 to 25 mol % of RO, where R is at least one kind selected from Li, Na and K. The glass ball includes a compressive stress layer in a surface thereof.

Glass ball having specific Young's modulus and coefficient of thermal expansion

To provide a glass ceramic composition with which a substrate for a light emitting element having a high reflectance and a high thermal conductivity can be obtained, and which can suppress breakage at the time of production of the substrate for a light emitting element. A glass ceramic composition to be used for production of a substrate on which a light emitting element is to be mounted, which comprises from 30 to 45 mass % of a glass powder, from 35 to 50 mass % of an alumina powder and from 10 to 30 mass % of a zirconia powder, to the total amount of the glass powder, the alumina powder and the zirconia powder, wherein the average particle size of the zirconia powder is at most &#xbc; of the average particle size of the alumina powder.

Glass ceramic composition, substrate for light emitting element, and light emitting device

Provided is a light-emitting device provided with a light reflection layer which has a high light reflectivity and which is less susceptible to deterioration of the reflectivity due to corrosion, and having an improved light extraction efficiency. A light-emitting device comprising a substrate having a conductor layer formed on its surface and a light-emitting element disposed on the conductor layer, characterized in that an overcoat layer is formed between the conductor layer and the light-emitting element, and the overcoat layer is a borosilicate glass which comprises, as represented by mol % based on oxides, from 62 to 84% of SiO, from 10 to 25% of BO, from 0 to 5% of AlOand from 0 to 5% in total of at least one of NaO and KO, provided that the total content of SiOand AlOis from 62 to 84%, and may contain from 0 to 10% of MgO and at least one of CaO, SrO and BaO in a total content of at most 5%.

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Tokyo, Japan

Kenji Imakita