发明名称 |
Method for producing glass substrate for magnetic disk, and magnetic disk |
摘要 |
A method for producing a glass substrate for a magnetic disk by polishing a circular glass plate, which comprises a step of polishing the principal plane of the circular glass plate by using a slurry containing a CeO2 crystal powder, the CeO2 crystal powder being obtained in such a manner that a melt containing CeO2 is quenched to obtain an amorphous material, and the amorphous material is subjected to heat treatment to obtain a CeO2 crystals-precipitated amorphous material, which is subjected to acid treatment to separate and extract the CeO2 crystal powder from the CeO2 crystals-precipitated amorphous material.
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申请公布号 |
US7857680(B2) |
申请公布日期 |
2010.12.28 |
申请号 |
US20070739997 |
申请日期 |
2007.04.25 |
申请人 |
ASAHI GLASS COMPANY, LIMITED |
发明人 |
MIYATANI KATSUAKI;MIYAHARA OSAMU;TANABE YUZURU;USUI HIROSHI;BEPPU YOSHIHISA;SUNAHARA KAZUO;HORIE MITSURU;KASHIWABARA SATOSHI;SAKAI TOMOHIRO;KON YOSHINORI;YOSHIDA IORI |
分类号 |
B24C3/00;C01G1/00;C03C21/00;G11B5/64;G11B5/706 |
主分类号 |
B24C3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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