| 发明名称 |
Glass-ceramic for a magnetic disk substrate and method for manufacturing the same. |
| 摘要 |
A glass-ceramic for a magnetic disk substrate in which the grain size can be controlled and the surface roughness after polishing is within the range from 15 ANGSTROM to 50 ANGSTROM is provided by heat treating a base glass including in weight percent: <TABLE> The glass-ceramic contains alpha-quartz (SiO2) and lithium disilicate (Li2O . 2SiO2) as main crystal phases. The grown crystal grain of alpha-quartz has a globular grain structure made of aggregated particles (secondary grain). |
| 申请公布号 |
EP0626353(A1) |
申请公布日期 |
1994.11.30 |
| 申请号 |
EP19940107585 |
申请日期 |
1994.05.17 |
| 申请人 |
KABUSHIKI KAISHA OHARA |
发明人 |
GOTO, NAOYUKI;YAMAGUCHI, KATSUHIKO |
| 分类号 |
C03C3/097;C03C3/04;C03C3/102;C03C3/105;C03C10/00;C03C10/12;C03C10/14;C03C23/00;G11B5/62;G11B5/73;G11B5/733;G11B5/82;G11B5/84 |
主分类号 |
C03C3/097 |
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