公开(公告)号：US5569409A

公开(公告)日：1996-10-29

申请号：US341962

申请日：1994-11-16

申请人： Harald Jachow ,  Reinhard K orner ,  Ronald J. Veitch ,  Ekkehard Schwab ,  Helmut Jakusch ,  Bernd H oppner ,  Rudi Lehnert ,  Manfred Ohlinger

发明人： Harald Jachow ,  Reinhard K orner ,  Ronald J. Veitch ,  Ekkehard Schwab ,  Helmut Jakusch ,  Bernd H oppner ,  Rudi Lehnert ,  Manfred Ohlinger

IPC分类号： C01G37/027 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/11

CPC分类号： C01G37/027 ,  G11B5/70636 ,  C01P2004/10 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/42 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/26

摘要： A finely divided acicular CrO.sub.2 modified with iron, tellurium and/or antimony and having a high coercive force possesses improved heat stability of the residual induction and a relatively narrow distribution of the particle size and of the coercive force. This CrO.sub.2 pigment is obtained by a method in which the iron compound used for the modification is iron oxalate, which is employed in an amount of 1-10% by weight, based on the theoretical CrO.sub.2 yield.

摘要翻译： 用铁，碲和/或锑改性并具有高矫顽力的精细分开的针状CrO 2具有改善的热稳定性，并且具有相对较窄的粒度分布和矫顽力的分布。 该CrO 2颜料通过以下方法获得：其中用于改性的铁化合物是草酸铁，其用量为1-10重量％，基于理论上的CrO 2收率。