-
公开(公告)号：US20240286946A1
公开(公告)日：2024-08-29
申请号：US18655216
申请日：2024-05-03
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki HASHIMOTO
摘要： Provided is a glass for a magnetic recording medium substrate or for a glass spacer for a magnetic recording/reproducing apparatus, in which a mole ratio of the total content of Al2O3and MgO relative to the total content of SiO2 and CaO [(Al2O3+MgO)/(SiO2+CaO)] is in a range of 0.417 or more and 0.6 or less, the total content of SiO2 and Al2O3 (SiO2+Al2O3) is in a range of 64 mol % or more and 85 mol % or less, the total content of SiO2, Al2O3, MgO, and CaO (SiO2+Al2O3+MgO+CaO) is in a range of 87 mol % or more and 98 mol % or less, the Na2O content is 0 mol %, and an average linear expansion coefficient of the glass at 100° C. to 300° C. is 68×10−7/° C. or less.
-
公开(公告)号：US20240116802A1
公开(公告)日：2024-04-11
申请号：US18533658
申请日：2023-12-08
申请人： HOYA CORPORATION
发明人： Koichi SATO , Yuki SHIOTA , Masashi KANEKO
摘要： The near-infrared absorbing glass includes four or more kinds of the prescribed main cations, and includes P ions, Ba ions and Cu ions as essential cations, wherein, in a glass composition expressed in anion %, the content of O ions is 90.0 anion % or more, in a glass composition expressed in atomic %, the ratio of the content of O ions to the content of P ions is 3.15 or less, in a glass composition expressed in mol % based on oxides, the total content of B2O3 and SiO2 is 3.0 mol % or less, the total content of MgO and Al2O3 is 8.0 mol % or less, and the total content of Li2O, Na2O and K2O is 15 mol % or less.
-
公开(公告)号：US20230192530A1
公开(公告)日：2023-06-22
申请号：US17784528
申请日：2020-12-11
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki HASHIMOTO
摘要： Provided is a glass for a magnetic recording medium substrate or for a glass spacer for a magnetic recording/reproducing apparatus, in which the total content of Li2O, Na2O, K2O, B2O3, and ZnO (Li2O+Na2O+K2O+B2O3+ZnO) is in a range of 0 mol % or more and 3 mol % or less, the mole ratio of the total content of Al2O3 and MgO relative to the total content of SiO2 and CaO [(Al2O3+MgO)/(SiO2+CaO)] is in a range of 0.30 or more and 0.6 or less, the total content of SiO2 and Al2O3 (SiO2+Al2O3) is in a range of 64 mol % or more and 85 mol % or less, and the total content of SiO2, Al2O3, MgO, and CaO (SiO2+Al2O3+MgO+CaO) is in a range of 87 mol % or more and 98 mol % or less.
-
公开(公告)号：US20220277768A1
公开(公告)日：2022-09-01
申请号：US17629002
申请日：2020-07-22
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki HASHIMOTO
摘要： Provided is a glass for a magnetic recording medium substrate, which is an amorphous glass, in which an SiO2 content is in a range of 54 mol % or more and 62 mol % or less, an MgO content is in a range of 15 mol % or more and 28 mol % or less, an Li2O content is in a range of 0.2 mol % or more, and an Na2O content is in a range of 5 mol % or less.
-
公开(公告)号：US20240321310A1
公开(公告)日：2024-09-26
申请号：US18732851
申请日：2024-06-04
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki Hashimoto
摘要： A glass for magnetic recording medium substrate is an amorphous oxide glass. In terms of mol %, SiO2 content ranges from 45 to 68%, Al2O3 from 5 to 20%, total content of SiO2 and Al2O3 60 to 80%, B2O3 from 0 to 5%, MgO from 3 to 28%, CaO from 0 to 18%, total content of BaO and SrO 0 to 2%, total content of alkali earth metal oxides from 12 to 30%, total content of alkali metal oxides from 3.5 to 15%, and at least one kind selected from the group made of Sn oxide and Ce oxide being included, a total content of Sn oxide and Ce oxide ranges from 0.05 to 2.00%, a glass transition temperature ≥625° C., a Young's modulus ≥83 GPa, a specific gravity ≤2.85, and an average linear expansion coefficient at 100 to 300° C.≥48×10−7/° C.
-
公开(公告)号：US20230322609A1
公开(公告)日：2023-10-12
申请号：US18013977
申请日：2021-05-31
申请人： HOYA CORPORATION
发明人： Yuki SHIOTA , Masashi KANEKO , Koichi SATO
摘要： The near-infrared absorbing glass, which contains at least four kinds of main cations selected from the group consisting of P ions, Li ions, Cu ions, Al ions, Ba ions, Sr ions, Ca ions, Mg ions, Zn ions, K ions, Na ions, La ions, Gd ions, and Y ions, contains P ions, Li ions, and Cu ions as essential cations, and contains at least O ions as anions, wherein a ratio (O ion/P ion) of a content of O ions relative to a content of P ions is 3.15 or less; in a glass composition indicated by anion %, a content of O ions is 90.0 anion % or more; and in an oxide-based glass composition on a molar basis, a total content of oxides of the main cations is 90.0% or more, and a total content (MgO+Al2O3) of MgO and Al2O3 is 8.0% or less.
-
公开(公告)号：US20230306996A1
公开(公告)日：2023-09-28
申请号：US18323378
申请日：2023-05-24
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki HASHIMOTO
CPC分类号： G11B5/73921 , C03C3/087
摘要： In an amorphous glass, an SiO2 content is in a range of 56 mol% or more. An MgO content is in a range of 15 mol% or more and 28 mol% or less. An Li2O content is in a range of 0.2 mol% or more. An Na2O content is in a range of 5 mol% or less. A total content of Al2O3, MgO, and CaO (Al2O3 + MgO + CaO) is 36.50 mol% or less. The total content of SiO2, MgO, Li20, Al2O3, and CaO (SiO2 + MgO + Li20 + Al2O3 + CaO) is 97.5 mol% or more. A mole ratio of the total content of SiO2 and MgO relative to the Li2O content [(SiO2 + MgO) / Li2O] is 13 or more. A mole ratio of a CaO content relative to a total content of Al2O3 and MgO [CaO / (Al2O3 + MgO)] is 0.10 or less.
-
公开(公告)号：US20230103236A1
公开(公告)日：2023-03-30
申请号：US18075606
申请日：2022-12-06
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki HASHIMOTO
摘要： A glass for magnetic recording medium substrate is an amorphous oxide glass. In terms of mol %, SiO2 content ranges from 45 to 68%, Al2O3 from 5 to 20%, total content of SiO2 and Al2O3 60 to 80%, B2O3 from 0 to 5%, MgO from 3 to 28%, CaO from 0 to 18%, total content of BaO and SrO 0 to 2%, total content of alkali earth metal oxides from 12 to 30%, total content of alkali metal oxides from 3.5 to 15%, and at least one kind selected from the group made of Sn oxide and Ce oxide being included, a total content of Sn oxide and Ce oxide ranges from 0.05 to 2.00%, a glass transition temperature ≥625° C., a Young's modulus ≥83 GPa, a specific gravity ≤2.85, and an average linear expansion coefficient at 100 to 300° C.≥48×10−7/° C.
-
公开(公告)号：US20210221729A1
公开(公告)日：2021-07-22
申请号：US17055500
申请日：2019-05-14
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki HASHIMOTO
摘要： Provided is a glass for a magnetic recording medium substrate, which is an amorphous oxide glass, in which an SiO2 content ranges from 56 mol % to 80 mol %, an Li2O content ranges from 1 mol % to 10 mol %, a B2O3 content ranges from 0 mol % to 4 mol %, a total content of MgO and CaO (MgO+CaO) ranges from 9 mol % to 40 mol %, and the oxide glass has a specific gravity of 2.75 g/cm3 or less, a glass transition temperature of 650° C. or higher, and a Young's modulus of 90 GPa or more.
-
10.发明公开公开(公告)号：US20240124346A1
公开(公告)日：2024-04-18
申请号：US18390144
申请日：2023-12-20
申请人： HOYA CORPORATION
发明人： Koichi SATO , Kazuaki HASHIMOTO
摘要： A glass is an amorphous oxide glass. An SiO2 content ranges from 56 mol % to 80 mol %, an Li2O content is 2.00 mol % or less, a B2O3 content ranges from 0 mol % to 4 mol %, a total content of MgO and CaO (MgO+CaO) ranges from 9 mol % to 40 mol %, and the oxide glass has a specific gravity of 2.75 g/cm3 or less, and a glass transition temperature of 650° C. or higher.
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.017 秒)
