High rigidity glass-ceramic substrate for a magnetic information storage medium
    1.
    发明授权
    High rigidity glass-ceramic substrate for a magnetic information storage medium 失效
    用于磁信息存储介质的高刚性玻璃陶瓷基板

    公开(公告)号:US06245411B1

    公开(公告)日:2001-06-12

    申请号:US09203187

    申请日:1998-11-30

    IPC分类号: G11B0582

    摘要: A high rigidity glass-ceramic substrate for a magnetic information storage medium has a ratio of Young's modulus to specific gravity within a range from 37 to 63 and comprises Al2O3 within a range from 10% to less than 20%. Predominant crystal phases of the glass-ceramic substrate consist of (1) cordierite or cordierite solid solution and (2) one or more crystals selected from the group consisting of Spinel crystal, Spinel crystal solid solution, enstatite, enstatite solid solution, &bgr;-quartz and &bgr;-quartz solid solution.

    摘要翻译: 用于磁信息存储介质的高刚性玻璃陶瓷基片具有在37至63的范围内的杨氏模量与比重的比率,并且包括在10%至小于20%的范围内的Al 2 O 3。 玻璃陶瓷基体的主要晶相由(1)堇青石或堇青石固溶体组成,(2)选自尖晶石,尖晶石固溶体,顽辉石,顽辉石固溶体,β-石英 和β-石英固溶体。