发明授权
- 专利标题: Process for preparing acicular ferromagnetic material consisting essentially of iron-containing chromium dioxide
- 专利标题(中): 制备基本上由含铁二氧化铬组成的针状铁磁材料的方法
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申请号: US429772申请日: 1989-10-31
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公开(公告)号: US5030371A公开(公告)日: 1991-07-09
- 发明人: Michael W. Mueller , Ekkehard Schwab , Helmut Auweter , Rainer Feser , Rudi Lehnert , Norbert Mueller , Manfred Ohlinger
- 申请人: Michael W. Mueller , Ekkehard Schwab , Helmut Auweter , Rainer Feser , Rudi Lehnert , Norbert Mueller , Manfred Ohlinger
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF
- 当前专利权人: BASF
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX3837646 19881105
- 主分类号: C01G49/00
- IPC分类号: C01G49/00 ; C09D5/23 ; C09D7/12 ; G11B5/706 ; H01F1/11
摘要:
An acicular, ferromagnetic material which has a high coercive force and essentially consists of iron-containing chromium dioxide is prepared by thermal decomposition of hydrated chromium(III) chromate under superatmospheric pressure.
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