发明授权
- 专利标题： Preparation of acicular .alpha.-Fe.sub.2 O.sub.3
- 专利标题（中）： 针状α-Fe2O3的制备
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申请号： US315049申请日： 1989-02-24
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公开(公告)号： US4913890A公开(公告)日： 1990-04-03
- 发明人: Volker Arndt , Helmut Auweter , Rainer Feser , Ekkehard Schwab
- 申请人： Volker Arndt , Helmut Auweter , Rainer Feser , Ekkehard Schwab
- 申请人地址： DEX Ludwigshafen
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DEX Ludwigshafen
- 优先权： DEX3807042 19880304
- 主分类号： C01G49/06
- IPC分类号： C01G49/06 ; G11B5/706 ; H01F1/11
摘要：
Finely divided acicular and pore-free .alpha.-Fe.sub.2 O.sub.3 is prepared from an iron(III) salt in the presence of one or more organic substances which form complexes with iron(III) ions, in alkaline supension at from 80.degree. to 250.degree. C., and is used for the preparation of magnetic materials suitable for magnetic recording media.