发明授权
US06344423B2 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
- 专利标题： High rigidity glass-ceramic substrate for a magnetic information storage medium
- 专利标题（中）： 用于磁信息存储介质的高刚性玻璃陶瓷基板
-
申请号： US09201333申请日： 1998-11-30
-
公开(公告)号： US06344423B2公开(公告)日： 2002-02-05
- 发明人: Naoyuki Goto , Kousuke Nakajima , Junko Ishioka
- 申请人： Naoyuki Goto , Kousuke Nakajima , Junko Ishioka
- 优先权： JP10-062192 19980226; JP10-271085 19980925
- 主分类号： C03C1014
- IPC分类号： C03C1014
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%. A predominant crystal phase of the glass-ceramic substrate consists of one or more crystals selected from the group consisting of &bgr;-quartz, &bgr;-quartz solid solution, enstatite, enstatite solid solution, forsterite and forsterite solid solution.