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公开(公告)号：JPH07165426A
公开(公告)日：1995-06-27
申请号：JP19303394
申请日：1994-08-17
Applicant: BASF MAGNETICS GMBH
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公开(公告)号：JPH07210857A
公开(公告)日：1995-08-11
申请号：JP28354294
申请日：1994-11-17
Applicant: BASF MAGNETICS GMBH
Inventor： HAARARUTO YAKOBU , RAINHARUTO KERUNAA , RONARUDO JIYON BAICHI , ETSUKEHARUTO SHIYUBUAPU , HERUMUUTO YAKUSHIYU , BERUNTO HEPUNAA , RUDEI REENERUTO , MANFUREETO OORINGAA
IPC: C01G37/027 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/11
Abstract: PURPOSE: To obtain a process for producing denatured chromium dioxide which exhibits a further narrow magnetic power distribution and coercive force distribution with respect to the prior art and, consequently, exhibits the coercive force of at least 40kA/m and thermal stability improved in magnetization as well. CONSTITUTION: This magnetic recording medium consists of a nonmagnetic substrate and at least one layer of magnetic layers which contain acicular CrO2 as the magnetic powder distributed uniformly in a polymer binder. The magnetic chromium dioxide is denatured by iron and tellurium or antimony and has the coercive force of at least 40kA/m, saturation magnetization of at least 85nTm /g and a specific surface area(SSA) of at least 25m /g. The decrease in the dependence of 50% in residual induction on temp. is resulted only at >=95 deg.C.
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公开(公告)号：JPH07138022A
公开(公告)日：1995-05-30
申请号：JP13543494
申请日：1994-06-17
Applicant: BASF MAGNETICS GMBH
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