Compositions – Magnetic – Iron-oxygen compound containing
Patent
1994-11-16
1996-10-29
Resan, Stevan A.
Compositions
Magnetic
Iron-oxygen compound containing
252 6251C, 252 6255, 428328, 428332, 428694BA, 428900, C01G 37027
Patent
active
055694098
ABSTRACT:
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.
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H oppner Bernd
Jachow Harald
Jakusch Helmut
K orner Reinhard
Lehnert Rudi
BASF Magnetics GmbH
Resan Stevan A.
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