发明申请
- 专利标题： Glass Substrate For Information Recording Medium
- 专利标题（中）： 玻璃基板用于信息记录介质
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申请号： US13806988申请日： 2011-06-21
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公开(公告)号： US20130231236A1公开(公告)日： 2013-09-05
- 发明人: Hideki Kawai , Hiroshi Kajita , Akio Oogaki , Toshiharu Mori
- 申请人： Hideki Kawai , Hiroshi Kajita , Akio Oogaki , Toshiharu Mori
- 申请人地址： JP Tokyo
- 专利权人： Konica Minolta Advanced Layers, Inc.
- 当前专利权人： Konica Minolta Advanced Layers, Inc.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2010-148571 20100630
- 国际申请： PCT/JP11/03548 WO 20110621
- 主分类号： C03C3/097
- IPC分类号： C03C3/097 ; G11B7/2531 ; G11B5/73
摘要：
The present invention relates to the glass substrate for an information recording medium comprising the following glass components: SiO2: 52 to 67; Al2O3: 8 to 20; B2O3: 0 to 6, with these three oxides FMO: 70 to 85; Li2O: 0.5 to 4; Na2O: 1 to 8; K2O: 0 to 5; and with these three oxides R2O: 5 to 15; MgO: 2 to 9; CaO: 0.1 to 5; BaO: 0 to 3; SrO: 0 to 3; ZnO: 0 to 5; and with these five oxides: 5 to 15; Y2O3: 0 to 4; La2O3: 0 to 4; Gd2O3: 0 to 4; CeO2: 0 to 4; TiO2: 1 to 7; HfO2: 0 to 2; ZrO2: 0 to 5; Nb2O5: 0.2 to 5; and Ta2O5: 0 to 5, and satisfies Li2O/R2O: 0.05 to 0.35; Li2O/FMO: 0.005 to 0.035; Li2O/(MgO+ZnO): less than 2 and Nb2O5/SiO2: 0.01 to 0.075.
公开/授权文献
- US08916487B2 Glass substrate for information recording medium 公开/授权日：2014-12-23
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