公开(公告)号：US20230312402A1

公开(公告)日：2023-10-05

申请号：US18024490

申请日：2021-08-23

Applicant: OHARA INC.

Inventor： SAYA KIKKAWA ,  KOHEI OGASAWARA ,  TOSHITAKA YAGI

IPC: C03C10/00 ,  C03C21/00

CPC classification number: C03C10/0027 ,  C03C10/0054 ,  C03C21/002 ,  C03C2204/00

Abstract: Provided are crystallized glass that is easy to process and in which a high compressive stress value can be obtained on a surface, and reinforced crystallized glass thereof. A crystallized glass containing at least one type selected from α-cristobalite and an 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 content of a B2O3 component is more than 0% and 10.0% or less.

公开(公告)号：US20230312401A1

公开(公告)日：2023-10-05

申请号：US18024489

申请日：2021-08-23

Applicant: OHARA INC.

Inventor： SAYA KIKKAWA ,  KOHEI OGASAWARA ,  TOSHITAKA YAGI

IPC: C03C10/00

CPC classification number: C03C10/0027 ,  C03C10/0054 ,  C03C2204/00

Abstract: Provided is reinforced crystallized glass that has a high strength and is less likely to break. The reinforced crystallized glass includes a compressive stress layer on a surface, and [CS50 μm*(DOLzero−50)]/2 is 2000 or more, where CS50 μm (MPa) is a compressive stress at a depth of 50 μm from an outermost surface, and DOLzero (μm) is a stress depth when the compressive stress is 0 MPa.

公开(公告)号：US20230242439A1

公开(公告)日：2023-08-03

申请号：US18011187

申请日：2021-06-07

Applicant: OHARA INC.

Inventor： KOHEI OGASAWARA ,  TOSHITAKA YAGI

IPC: C03C10/00 ,  C03C21/00

CPC classification number: C03C10/0045 ,  C03C10/0054 ,  C03C21/002 ,  C03C2204/00

Abstract: Reinforced crystallized glass characterized including crystallized glass as a base material, the crystallized glass containing, as expressed in terms of mol % on an oxide basis, 30.0% to 70.0% of an SiO2 component, 8.0% to 25.0% of an Al2O3 component, 2.0% to 25.0% of an Na2O component, 1.0% to 6.0% of an Li2O component, 0 % to 25.0% of an MgO component, 0% to 30.0% of a ZnO component, and 0% to 10.0% of a TiO2 component, in which a surface of the reinforced crystallized glass is formed with a compressive stress layer, and a depth (DOLzero) of the compressive stress layer is 60 μm or more.

公开(公告)号：US20230159384A1

公开(公告)日：2023-05-25

申请号：US18154042

申请日：2023-01-13

Applicant: OHARA INC.

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

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

CPC classification number: C03C21/002 ,  C03C4/18 ,  C03C10/0018 ,  C03C2204/00

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：US20210139362A1

公开(公告)日：2021-05-13

申请号：US17043759

申请日：2019-03-13

Applicant: OHARA INC.

Inventor： MORIJI NOZAKI ,  TOSHITAKA YAGI ,  KOHEI OGASAWARA

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

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：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.

公开(公告)号：US20230150865A1

公开(公告)日：2023-05-18

申请号：US18154041

申请日：2023-01-13

Applicant: OHARA INC.

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

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

CPC classification number: C03C10/0018 ,  C03C4/18 ,  C03C21/002 ,  C03C2204/00

Abstract: To provide a crystallized glass substrate including a surface with a compressive stress layer, where 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 a central stress CT determined by using curve analysis is 55 to 300 MPa.

公开(公告)号：US20210230048A1

公开(公告)日：2021-07-29

申请号：US17266111

申请日：2018-08-09

Applicant: OHARA INC.

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

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

Abstract: To provide a crystallized glass substrate including a surface with a compressive stress layer, where 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 a central stress CT determined by using curve analysis is 55 to 300 MPa.

公开(公告)号：US20210163339A1

公开(公告)日：2021-06-03

申请号：US17266996

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 a compressive stress CS (MPa) on an outermost surface of the compressive stress layer is 400 to 1400 MPa, and DOL50%/DOLzero is 0.30 or more, where DOL50% (μm) is a depth at which the value of the compressive stress is 50% of the CS and DOLzero (μm) is a depth at which the value of the compressive stress is 0 MPa.