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本页收录老挝专利「--」的公开登记要点，由 HOYA CORPORATION 于 2017-11-14 提交申请，当前状态为已注册。公开档案中可核验：申请号 P/665，DIP 编号 LAP665，主管局代码 LA，保护类型 Patent - PCT National Phase。时间线要点：公开/公告日 2022-10-28；授权日 2022-10-24；届满/失效参考日 2037-11-14。技术或外观分类记载为 C03C 3/085、C03C 3/087、C03C 3/091、G11B 5/73。发明人 / 设计人包括 HASHIMOTO Kazuaki、SATO Koichi。代理机构 / 代理人记载为 Tilleke & Gibbins Lao Co., Ltd。公开摘要提示：Provided is a glass for magnetic recording medium substrates, which is an amorphous oxide glass that has, in mol%, an SiO。
P/665
图样
基础信息
- 类型
- 专利
- 申请号
P/665- 状态
- 已注册
- 申请人
- HOYA CORPORATION
- 代理机构
- Tilleke & Gibbins Lao Co., Ltd
- 申请日期
- 2017-11-14
- 注册号
P/665- 公开 / 公告日
- 2022-10-28
- 注册 / 授权日
- 2022-10-24
- 到期日
- 2037-11-14
- 保护类型
- Patent - PCT National Phase
- 公报号
- 178 · 2022-10-28
- 申请人地址
- HOYA CORPORATION · 6-10-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo 1608347 · JP
- 代理地址
- Tilleke & Gibbins Lao Co., Ltd · No. 302/1B, 3rd Floor, Vieng Vang Tower, Unit 15, Boulichan Road, Dongpalan Thong Village, Sisattanak District, Vientiane Capital, Lao PDR · LA
- 国际分类
- C03C 3/085 · C03C 3/087 · C03C 3/091 · G11B 5/73
- 商品 / 服务
- —
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摘要
Provided is a glass for magretic recording medium substrate, which is an amorphous
oxide glass, wherein, in terms of mol%, ao SiOz content ranges from 45 to 68%; an AlzOr
content ranges from 5 to 20yo; atotal content of SiO2 and AlzO: ranSes from 60 to 80%; a
B2O3 content ranges from 0 to 5%; an MgO content ranges from3 to 28Yo; a CaO content
ratrges from 0 to I 8%; a total content of BaO and Sr0 ranges from 0 to 2%o; a total content of
alkali earth metal oxides ranges fro m 12to 30o/o; a total content of alkali metal oxides ranges
from 3.5 to 15%; and at least one kind selected from the group consisting ofSn 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 is equal to or higher than 625oC; a Young's modulus is equal to or
more than 83 GPa; a specific gravity is equal to or less than 2.85; and an average linear
expansion coefficient at 100 to 300'C is equal to or more than 48"10-?/oC
Provided is a glass for magnetic recording medium substrates, which is an amorphous oxide glass that has, in mol%, an SiO
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