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1. 发明授权

US09236075B2 Crystallized glass and crystallized glass substrate for information recording medium 有权
标题翻译：结晶玻璃和结晶玻璃基板，用于信息记录介质
公开(公告)号：US09236075B2
公开(公告)日：2016-01-12
申请号：US14081583
申请日：2013-11-15
申请人： OHARA INC.
发明人： Kiyoyuki Momono , Katsuhiko Yamaguchi , Toshitaka Yagi , Naoyuki Goto
IPC分类号： G11B5/73 , G11B5/62 , C03C1/00
CPC分类号： G11B5/62 , C03C1/00 , C03C3/085 , C03C3/091 , C03C3/093 , C03C3/097 , C03C10/0045 , C03C21/002 , G11B5/7315
摘要： It is an object of the present invention to provide a crystallized glass which has various properties required for employing the substrate for information recording medium of the next generation, and also has significantly low specific gravity; and a crystallized glass substrate for information recording medium. A crystallized glass containing, as a crystal phase, one or more selected from RAl2O4 and R2TiO4 (wherein R is one or more selected from Mg and Fe), the crystallized glass comprising the components of SiO2 of 50% to 70%, Al2O3 of 10% to 26%, TiO2 of 1 to 15%, MgO of 2.5% to 25%, FeO of 0% to 8%, and ZnO of 0% to less than 2%, expressed in terms of mass percentage on an oxide basis, wherein the value of (Al2O3+MgO)/SiO2 is 0.30 or more and 0.65 or less, and a specific gravity is less than 2.63.
摘要翻译：本发明的目的是提供一种结晶玻璃，其具有使用下一代信息记录介质的基板所需的各种性质，并且还具有显着低的比重; 和用于信息记录介质的结晶玻璃基板。作为结晶相的结晶化玻璃含有选自RA 1/2 O 4和R 2 TiO 4（其中R是选自Mg和Fe中的一种或多种）的一种或多种，结晶玻璃包含50％至70％的SiO 2成分，10％的Al 2 O 3 ％至26％，TiO 2为1至15％，MgO为2.5％至25％，FeO为0％至8％，ZnO为0％至小于2％，以氧化物为基准，（Al 2 O 3 + MgO）/ SiO 2的值为0.30以上且0.65以下，比重小于2.63。

2. 发明申请

US20140141285A1 CRYSTALLIZED GLASS AND CRYSTALLIZED GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM 有权
标题翻译：用于信息记录介质的结晶玻璃和结晶玻璃基板
公开(公告)号：US20140141285A1
公开(公告)日：2014-05-22
申请号：US14081583
申请日：2013-11-15
申请人： OHARA INC.
发明人： Kiyoyuki Momono , Katsuhiko Yamaguchi , Toshitaka Yagi , Naoyuki Goto
IPC分类号： G11B5/62
CPC分类号： G11B5/62 , C03C1/00 , C03C3/085 , C03C3/091 , C03C3/093 , C03C3/097 , C03C10/0045 , C03C21/002 , G11B5/7315
摘要： It is an object of the present invention to provide a crystallized glass which has various properties required for employing the substrate for information recording medium of the next generation, and also has significantly low specific gravity; and a crystallized glass substrate for information recording medium. A crystallized glass containing, as a crystal phase, one or more selected from RAl2O4 and R2TiO4 (wherein R is one or more selected from Mg and Fe), the crystallized glass comprising the components of SiO2 of 50% to 70%, Al2O3 of 10% to 26%, TiO2 of 1 to 15%, MgO of 2.5% to 25%, FeO of 0% to 8%, and ZnO of 0% to less than 2%, expressed in terms of mass percentage on an oxide basis, wherein the value of (Al2O3+MgO)/SiO2 is 0.30 or more and 0.65 or less, and a specific gravity is less than 2.63.
摘要翻译：本发明的目的是提供一种结晶玻璃，其具有使用下一代信息记录介质的基板所需的各种性质，并且还具有显着低的比重; 和用于信息记录介质的结晶玻璃基板。作为结晶相的结晶化玻璃含有选自RA 1/2 O 4和R 2 TiO 4（其中R是选自Mg和Fe中的一种或多种）的一种或多种，结晶玻璃包含50％至70％的SiO 2成分，10％的Al 2 O 3 ％至26％，TiO 2为1至15％，MgO为2.5％至25％，FeO为0％至8％，ZnO为0％至小于2％，以氧化物为基准，（Al 2 O 3 + MgO）/ SiO 2的值为0.30以上且0.65以下，比重小于2.63。

3. 发明授权

US11104607B2 Crystallized glass 有权
公开(公告)号：US11104607B2
公开(公告)日：2021-08-31
申请号：US16488248
申请日：2017-12-28
申请人： OHARA INC.
发明人： Toshitaka Yagi , Yutaka Yamashita , Naoyuki Goto
IPC分类号： C03C3/087 , C03C21/00 , C03C4/00
摘要： A crystallized glass includes a crystallized glass mother material, and, in a surface, a compressive stress layer, wherein the crystallized glass has, for a thickness of 10 mm, a light transmittance of, including reflection loss, 80% at a wavelength in 400 to 669 nm, and has a Vickers hardness [Hv] of 835 to 1300. In the crystallized glass, the crystallized glass mother material contains, in % by weight on an oxide basis, 40.0% to 70.0% of a SiO2 component, 11.0% to 25.0% of an Al2O3 component, 5.0% to 19.0% of a Na2O component, 0% to 9.0% of a K2O component, 1.0% to 18.0% of a MgO component, 0% to 3.0% of a CaO component, and 0.5% to 12.0% of a TiO2 component, and a total content of the SiO2 component, the Al2O3 component, the Na2O component, the K2O component, the MgO component, and the TiO2 component is 90% or more.

4. 发明授权

US11584685B2 Crystallized glass substrate 有权
公开(公告)号：US11584685B2
公开(公告)日：2023-02-21
申请号：US17266634
申请日：2018-08-09
申请人： OHARA INC.
发明人： Toshitaka Yagi , Kohei Ogasawara , Yuki Motoshima , Reika Kojima , Yutaka Yamashita , Naoyuki Goto
IPC分类号： C03C21/00 , C03C4/18 , C03C10/00
摘要： 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.

5. 发明授权

US11577989B2 Crystallized glass substrate 有权
公开(公告)号：US11577989B2
公开(公告)日：2023-02-14
申请号：US17266111
申请日：2018-08-09
申请人： OHARA INC.
发明人： Toshitaka Yagi , Kohei Ogasawara , Yuki Motoshima , Reika Kojima , Yutaka Yamashita , Naoyuki Goto
IPC分类号： C03C10/00 , C03C4/18 , C03C21/00
摘要： 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.

6. 发明授权

US11104603B2 Crystallized glass substrate 有权
公开(公告)号：US11104603B2
公开(公告)日：2021-08-31
申请号：US16626727
申请日：2018-04-10
申请人： OHARA INC.
发明人： Toshitaka Yagi , Yutaka Yamashita , Naoyuki Goto
IPC分类号： C03C3/085 , C03C3/087 , C03C10/00 , C03C4/18 , C03C21/00
摘要： To provide a crystallized glass substrate that is hard and resistant to fracture and that is also resistant to shattering upon breakage.
A crystallized glass substrate includes a crystallized glass serving as a base material and a compressive stress layer forming a surface thereof. The crystallized glass contains, in % by weight on an oxide basis, 40.0% to 70.0% of a SiO2 component, 11.0% to 25.0% of an Al2O3 component, 5.0% to 19.0% of a Na2O component, 0% to 9.0% of a K2O component, 1.0% to 18.0% of one or more selected from a MgO component and a ZnO component, 0% to 3.0% of a CaO component, and 0.5% to 12.0% of a TiO2 component. The SiO2 component, the Al2O3 component, the Na2O component, the one or more selected from the MgO component and the ZnO component, and the TiO2 component are present in a total amount of 90% or more. The compressive stress layer has a depth of layer of 40 μm or more. The compressive stress layer has a surface compressive stress of 750 MPa or more. The compressive stress layer has a central tension of 65 MPa or less as determined by curve analysis.

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