发明名称 |
Magnetite particles and process for preparing the same |
摘要 |
There are provided magnetite particles characterized in that they have surfaces each covered with a thin film or iron-zinc oxides or further covered thereon with a thin film of iron-silicon oxides and have a saturation magnetization of at least 79 emu/g, a degree of blackness (L) of at most 19.5 as measured with a differential colorimeter, and an absorption of at least 30 ml/100 g as measured according to JIS K 5101. There is also provided a process for preparing magnetite particles as described above.
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申请公布号 |
US5556571(A) |
申请公布日期 |
1996.09.17 |
申请号 |
US19950511262 |
申请日期 |
1995.08.04 |
申请人 |
MITSUI MINING & SMELTING CO., LTD. |
发明人 |
HASHIUCHI, MASACHIKA;MIYAZONO, TAKESHI;WATANABE, HIROYUKI;YAMANISHI, TADASHI |
分类号 |
C09C1/24;C09C3/06;C09K3/32;G03G9/083;(IPC1-7):H01F1/11;H01F1/36 |
主分类号 |
C09C1/24 |
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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