公开(公告)号：US20220259094A1

公开(公告)日：2022-08-18

申请号：US17735055

申请日：2022-05-02

Applicant: OHARA INC.

Inventor： KOHEI OGASAWARA ,  TOSHITAKA YAGI ,  NOZOMU ODA

IPC: C03C10/00

Abstract: To provide an inorganic composition article containing at least one kind selected from α-cristobalite and α-cristobalite solid solution as a main crystal phase, in which by mass % in terms of oxide, a content of a SiO2 component is 50.0% to 75.0%, a content of a Li2O component is 3.0% to 10.0%, a content of an Al2O3 component is 5.0% or more and less than 15.0%, and a total content of the Al2O3 component and a ZrO2 component is 10.0% or more, and a surface compressive stress value is 600 MPa or more.

公开(公告)号：US20240018029A1

公开(公告)日：2024-01-18

申请号：US18373886

申请日：2023-09-27

Applicant: OHARA INC.

Inventor： MORIJI NOZAKI ,  TOSHITAKA YAGI ,  KOHEI OGASAWARA

IPC: C03B23/02 ,  C03B32/02 ,  C03C3/085

CPC classification number: C03B23/02 ,  C03B32/02 ,  C03C3/085 ,  C03B2201/07 ,  C03B2201/32 ,  C03B2201/42

Abstract: To obtain a crystallized glass member having a curved shape and provide a method for producing the same. A method for producing a crystallized glass member having a curved shape, including a deformation step for adjusting the temperature of a plate glass to a first temperature zone from higher than [At+40]° C. to [At+146]° C. or lower, where At is the yield point (° C.) of the plate glass and deforming at least part of the plate glass into a curved shape by external force acting on the plate glass while precipitating crystals from the plate glass.

公开(公告)号：US20220324749A1

公开(公告)日：2022-10-13

申请号：US17640341

申请日：2020-08-19

Applicant: OHARA INC.

Inventor： KEISUKE SHIMAMURA ,  TOSHITAKA YAGI ,  KOHEI OGASAWARA

IPC: C03C10/00 ,  C03C4/18 ,  C03C21/00

Abstract: Crystallized glass and strengthened crystallized glass with a novel composition, which have a high refractive index and high hardness, are provided. A crystallized glass, including, by mass % in terms of oxide, 20.0% or more and less than 40.0% of a SiO2 component, more than 0% and 20.0% or less of a Rn2O component, where Rn is one or more selected from Li, Na, and K, 7.0% to 25.0% of an Al2O3 component, 0% to 25.0% of a MgO component, 0% to 45.0% of a ZnO component, and 0% to 20.0% of a Ta2O5 component, in which a total amount of the MgO component, the ZnO component, and the Ta2O5 component is 10.0% or more.

公开(公告)号：US20220144691A1

公开(公告)日：2022-05-12

申请号：US17436612

申请日：2020-03-05

Applicant: OHARA INC.

Inventor： KOHEI OGASAWARA ,  TOSHITAKA YAGI ,  NOZOMU ODA

IPC: C03C10/00

Abstract: To provide an inorganic composition article containing at least one kind selected from α-cristobalite and α-cristobalite solid solution as a main crystal phase, in which by mass % in terms of oxide, a content of a SiO2 component is 50.0% to 75.0%, a content of a Li2O component is 3.0% to 10.0%, a content of an Al2O3 component is 5.0% or more and less than 15.0%, and a total content of the Al2O3 component and a ZrO2 component is 10.0% or more, and a surface compressive stress value is 600 MPa or more.

公开(公告)号：US20240010546A1

公开(公告)日：2024-01-11

申请号：US18024491

申请日：2021-08-23

Applicant: OHARA INC.

Inventor： SAYA KIKKAWA ,  KOHEI OGASAWARA ,  TOSHITAKA YAGI

IPC: C03C10/00

CPC classification number: C03C10/0009 ,  C03C10/0054 ,  C03C2204/00

Abstract: Provided is an inorganic composition article that is hard and highly transparent. The inorganic composition article includes at least one type selected from α-cristobalite and an α-cristobalite solid solution as a main crystal phase, has a coloring degree λ80 of 330 to 580 nm at a thickness of 10 mm, and has a Vickers hardness of 620 or more.

公开(公告)号：US20220024802A1

公开(公告)日：2022-01-27

申请号：US17296983

申请日：2018-12-21

Applicant: OHARA INC.

Inventor： TOSHITAKA YAGI ,  KOHEI OGASAWARA

IPC: C03C3/087 ,  C03C10/00

Abstract: Provided is a crystallized glass substrate including a surface with a compressive stress layer, in which a gradient A of a surface compressive stress from an outermost surface to a depth of 6 μm in the compressive stress layer is 50.0 to 110.0 MPa/μm, a gradient B of a surface compressive stress from a depth of (a stress depth DOLzero—10 μm) to the stress depth DOLzero is 2.5 to 15.0 MPa/μm, where the stress depth DOLzero is a depth of the compressive stress layer at a surface compressive stress of 0 MPa, and a hardness of the outermost surface at an indentation depth of 20 nm is 7.50 to 9.50 GPa.

公开(公告)号：US20210300818A1

公开(公告)日：2021-09-30

申请号：US17266634

申请日：2018-08-09

Applicant: OHARA INC.

Inventor： TOSHITAKA YAGI ,  KOHEI OGASAWARA ,  YUKI MOTOSHIMA ,  REIKA KOJIMA ,  YUTAKA YAMASHITA ,  NAOYUKI GOTO

IPC: C03C21/00 ,  C03C10/00 ,  C03C4/18

Abstract: To provide a crystallized glass substrate including a surface with a compressive stress layer, in which a stress depth DOLzero of the compressive stress layer, at which the compressive stress is 0 MPa, is 45 to 200 μm, a compressive stress CS on an outermost surface of the compressive stress layer is 400 to 1400 MPa, and CS×DOLzero, which is a product of the compressive stress CS on the outermost surface and the stress depth DOLzero(μm), is 4.8×104 or more.

公开(公告)号：US20210163340A1

公开(公告)日：2021-06-03

申请号：US17266997

申请日：2018-08-09

Applicant: OHARA INC.

Inventor： TOSHITAKA YAGI ,  KOHEI OGASAWARA ,  YUKI MOTOSHIMA ,  REIKA KOJIMA ,  YUTAKA YAMASHITA ,  NAOYUKI GOTO

IPC: C03C3/087

Abstract: To provide a crystallized glass substrate including a surface with a compressive stress layer, in which, CS is 400 to 1400 MPa and CT×(T−2×DOLzero)/CS×DOLzero is 0.60 or more, where CS (MPa) denotes a compressive stress on an outermost surface of the compressive stress layer, DOLzero (μm) denotes a stress depth of the compressive stress layer at which the compressive stress is 0 MPa, CT (MPa) denotes a central stress determined by curve analysis, and T (μm) denotes a thickness of the substrate.

公开(公告)号：US20250128979A1

公开(公告)日：2025-04-24

申请号：US18834606

申请日：2023-01-31

Applicant: OHARA INC.

Inventor： SAYA KIKKAWA ,  TOSHITAKA YAGI ,  KOHEI OGASAWARA

IPC: C03C3/097 ,  C03C3/087 ,  C03C3/091

Abstract: This inorganic composition article is characterized by: being obtained by tempering a crystallized glass which contains, as the main crystal phase thereof, at least one selected from α-cristobalite and an α-cristobalite solid solution, and in which, when expressed as mass % of respective oxides, the contained amount of component SiO2 is not less than 45.0% but less than 68.0%, the contained amount of component Al2O3 is 3.0-15.0%, the contained amount of the component Li2O is 3.0-10.0%, the contained amount of component B2O3 is more than 0% but not more than 10.0%, the contained amount of component P2O5 is more than 0% but not more than 10.0%, the contained amount of the component ZrO2 is more than 0% but not more than 10.0%; and the mass ratio of SiO2/(B2O3+Li2O) is 3.0-10.0; having a compressive stress layer on the surface thereof; and having a softening point (SP) of lower than 795° C.

公开(公告)号：US20250100924A1

公开(公告)日：2025-03-27

申请号：US18713168

申请日：2022-10-05

Applicant: OHARA INC.

Inventor： TOSHITAKA YAGI ,  KOHEI OGASAWARA ,  SAYA KIKKAWA ,  AYANO MORI

IPC: C03C10/00 ,  C03C21/00

Abstract: Provided is an inorganic composition article obtained by reinforcing a crystallized glass and having a compressive stress layer on the surface, the compressive stress at a depth of 30 μm from an outermost surface being 120-320 MPa, and the crystallized glass comprising, as a main crystal phase, one or more types of crystal phases selected from α-cristobalite and an α-cristobalite solid solution, wherein in mass % calculated in terms of oxides, the content of an SiO2 component is 50.0-75.0%, the content of an Li2O component is 3.0-10.0%, the content of an Al2O3 component is from 5.0% to less than 15.0%, the content of a B2O3 component is from greater than 0% to 10.0% or less, the content of a P2O5 component is from greater than 0% to 10.0% or less, and a mass ratio of SiO2/(B2O3+Li2O) is 3.0-10.0.