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公开(公告)号：US20240286945A1
公开(公告)日：2024-08-29
申请号：US18573117
申请日：2022-06-10
发明人： Mayu NISHIMIYA
摘要： An alkali-free glass sheet of the present invention contains, as a glass composition, in mol %, from 64 to 72% of SiO2, from 11 to 15% of Al2O3, from 0 to 4% of B203, from 0 to 0.5% of Li2O'Na2O+K2O, from 5 to 12% of MgO, from 7 to 12% of CaO, from 0 to 1% of SrO, from 0 to 1% of BaO, and from 15 to 19% of MgO+CaO+SrO+BaO, and has a mol % ratio B203/Al2O3 of from 0.1 to 0.4, and a mol % ratio MgO/CaO of from 0.1 to 1.5.
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公开(公告)号：US20230162759A1
公开(公告)日：2023-05-25
申请号：US17912081
申请日：2021-05-18
发明人： Mayu NISHIMIYA
CPC分类号： G11B5/73921 , G11B5/73913 , C03C3/093 , C03C3/091 , C03C3/087
摘要： A glass disk for a magnetic recording medium of the present invention has a disk shape, and has a strain point of 695° C. to 780° C., a temperature at 104.5 dPa·s of 1300° C. or lower, and a Young's modulus of 78 GPa or higher.
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公开(公告)号：US20240262737A1
公开(公告)日：2024-08-08
申请号：US18290031
申请日：2022-05-09
发明人： Mayu NISHIMIYA
CPC分类号： C03C3/093 , C03C3/087 , G11B5/73921 , H10K77/10
摘要： An alkali-free glass sheet of the present invention contains, as a glass composition, in mol %, from 64 to 72% of SiO2, from 12 to 15% of Al2O3, from 0 to 3% of B2O3, from 0 to 0.5% of Li2O+Na2O+K2O, from 6 to 12% of MgO, from 9 to 13% of CaO, from 0 to 2% of SrO, and from 0 to 1% of BaO, and the alkali-free glass sheet has a mol % ratio SrO/SiO2 of from 0 to 0.03.
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公开(公告)号：US20230257295A1
公开(公告)日：2023-08-17
申请号：US18010589
申请日：2021-06-15
发明人： Mayu NISHIMIYA
IPC分类号： C03C3/091
CPC分类号： C03C3/091
摘要： The present invention provides an alkali-free glass sheet, which has a content of Li2O+Na2O+K2O of from 0 mol % to 0.5 mol % in a glass composition, and has a Young's modulus of 80 GPa or more, a strain point of 700° C. or more, and a liquidus temperature of 1,350° C. or less.
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公开(公告)号：US20220204385A1
公开(公告)日：2022-06-30
申请号：US17438290
申请日：2020-03-06
发明人： Masahiro HAYASHI , Mayu NISHIMIYA
IPC分类号： C03C3/093
摘要： A glass substrate of the present invention has a strain point of from 695° C. to 740° C., a temperature at 104.5 dPa·s of 1,300° C. or less, a liquidus viscosity of 104.5 dPa·s or more, a Young's modulus of 78 GPa or more, and a thermal shrinkage rate in heat treatment at 500° C. for 1 hour of 20 ppm or less.
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公开(公告)号：US20240270625A1
公开(公告)日：2024-08-15
申请号：US18290040
申请日：2022-05-09
发明人： Mayu NISHIMIYA
CPC分类号： C03C3/093 , C03C3/087 , G11B5/73921 , H10K77/10
摘要： An alkali-free glass sheet of the present invention contains, as a glass composition, in mol %, from 64 to 72% of SiO2, from 12 to 16% of Al2O3, from 0 to 3% of B2O3, from 0 to 0.5% of Li2O+Na2O+K2O, from 6 to 12% of MgO, from 3 to less than 9% of CaO, from 0 to 2% of SrO, and from 0 to 1% of BaO, and the alkali-free glass sheet has a mol % ratio SrO/CaO of from 0 to 0.2, and a mol % ratio (MgO+CaO+SrO+BaO)×CaO/(SiO2×MgO) of from 0 to 0.3.
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公开(公告)号：US20230212060A1
公开(公告)日：2023-07-06
申请号：US17920962
申请日：2021-06-21
发明人： Mayu NISHIMIYA
IPC分类号： C03C3/091
CPC分类号： C03C3/091 , C03C2201/32
摘要： The present invention provides an alkali-free glass sheet, including as a glass composition, in terms of mol%, 64% to 71% of SiO2, 12.5% to 17% of Al2O3, 0% to 4% of B2O3, 0% to 0.5% of Li2O+Na2O+K2O, 6% to 11% of MgO, 3% to 11% of CaO, 0% to 6% of SrO, 0% to 1% of BaO, and 14% to 19% of MgO+CaO+SrO+BaO, and having a mole percent ratio (Al2O3/CaO)×{B2O3/(MgO+CaO+SrO+BaO)} of from 0 to 0.5, a mole percent ratio MgO/(CaO+SrO) of from 0.5 to 1.5, a mole percent ratio (MgO+CaO+SrO+BaO-Al2O3)×B2O3 of from 1 to 10, and a mole percent ratio SiO2×CaO/MgO of from 30 to 90.
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公开(公告)号：US20210380465A1
公开(公告)日：2021-12-09
申请号：US17284917
申请日：2019-10-07
发明人： Mayu NISHIMIYA
IPC分类号： C03C3/091
摘要： The present invention provides an alkali-free glass sheet, which has a content of Li2O+Na2O+K2O of from 0 mol % to 0.5 mol % in a glass composition, and has a Young's modulus of 78 GPa or more, a strain point of 680° C. or more, and a liquidus temperature of 1,450° C. or less.
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