公开(公告)号：JPH01219024A

公开(公告)日：1989-09-01

申请号：JP59689

申请日：1989-01-06

Applicant: BASF AG

Inventor： DEIITAA SHIYUTOTSUKUBURUGAA ,  RAINAA FUEZAA ,  ZAFUIRIOSU GURAMATEISU ,  NORUBERUTO MIYURAA ,  MANFUREETO OORINGAA ,  HERUMUUTO RAINITSUKE ,  KAARUUHAINTSU ZARUTOORU ,  HAINTSU SHIYURINTOBUAIN ,  BUERUNAA SHIYUTETSUKU

IPC: C01G37/02 ,  C01G37/027

公开(公告)号：JPS6472923A

公开(公告)日：1989-03-17

申请号：JP20850088

申请日：1988-08-24

Applicant: BASF AG

Inventor： BERUNTO MAIYAA ,  BUERUNAA SHIYUTETSUKU ,  BERUNHARUTO BETOHIYAA ,  HERUMUUTO YAKUSHIYU ,  RAINAA FUEZAA

IPC: C01G37/02 ,  C01G37/027 ,  G11B5/706 ,  H01F1/10

公开(公告)号：JPS62216919A

公开(公告)日：1987-09-24

申请号：JP5430287

申请日：1987-03-11

Applicant: BASF AG

Inventor： FUORUKAA ARUNTO ,  RAINAA FUEZAA ,  BUERUNAA SHIYUTETSUKU ,  HERUMUUTO YAKUSHIYU

IPC: H01F1/11 ,  C01G49/00 ,  C01G49/06 ,  C09C1/24 ,  G11B5/706

公开(公告)号：JPS5997533A

公开(公告)日：1984-06-05

申请号：JP19933283

申请日：1983-10-26

Applicant: BASF AG

Inventor： BUERUNAA SHIYUTETSUKU ,  IEENE KOFUAKUSU ,  NORUBERUTO MIERAA ,  HERUMUUTO YAKUSHIYU

IPC: C01G37/027 ,  G11B5/706 ,  H01F1/11

公开(公告)号：JPS5637227A

公开(公告)日：1981-04-10

申请号：JP11854080

申请日：1980-08-29

Applicant: BASF AG

Inventor： BUIRUHERUMU ZARUNETSUKI ,  RASUTSURO MAROOJI ,  HORUSUTO AUTSUEN ,  MANFUREETO OORINGAA ,  BUERUNAA SHIYUTETSUKU

IPC: C01G49/02 ,  C01G49/06 ,  G11B5/706 ,  H01F1/11

公开(公告)号：JPH05294886A

公开(公告)日：1993-11-09

申请号：JP2088091

申请日：1991-02-14

Applicant: BASF AG

Inventor： BUERUNAA SHIYUTETSUKU ,  MATSUCHIASU SHIYUBUARUTSUMAN ,  KURUTO BUAINAHATO ,  FURANTSU MERUGAA

IPC: B01J23/02 ,  B01J29/08 ,  C07B61/00 ,  C07C45/51 ,  C07C47/22

公开(公告)号：JPS62223025A

公开(公告)日：1987-10-01

申请号：JP5702187

申请日：1987-03-13

Applicant: BASF AG

Inventor： FUORUKAA ARUNTO ,  BERUNTO MAIYAA ,  RAINAA FUEZAA ,  BUERUNAA SHIYUTETSUKU ,  HERUMUUTO YAKUSHIYU

IPC: C01G49/06 ,  C09C1/24 ,  G11B5/706 ,  H01F1/11

公开(公告)号：JPS62186501A

公开(公告)日：1987-08-14

申请号：JP2263987

申请日：1987-02-04

Applicant: BASF AG

Inventor： KURAUSU DEIITAA HOPE ,  BUERUNAA SHIYUTETSUKU ,  IEENE KOFUAKUSU ,  RAINAA FUEZAA ,  HERUMUUTO YAKUSHIYU

IPC: B22F9/20 ,  B22F9/22 ,  C01G49/06 ,  G11B5/706 ,  G11B5/712 ,  H01F1/06

公开(公告)号：JPS6287417A

公开(公告)日：1987-04-21

申请号：JP21738386

申请日：1986-09-17

Applicant: BASF AG

Inventor： BUERUNAA SHIYUTETSUKU ,  RASUTSURO MAROZUI ,  HERUBERUTO HAABAAKORUN ,  RAINAA FUEZAA ,  BUERUNAA HIYUUBUNAA ,  HERUMUUTO YAKUSHIYU

IPC: H01F1/11 ,  C01G37/027 ,  G11B5/706

公开(公告)号：JPH0271502A

公开(公告)日：1990-03-12

申请号：JP31663788

申请日：1988-12-16

Applicant: BASF AG

Inventor： MIHIYAERU BUORUFUGANGU MIYURAA ,  KURAUSUUDEIITAA HOTSUPE ,  ETSUKEHARUTO SHIYUBUAPU ,  BUERUNAA SHIYUTETSUKU ,  HERUMUUTO AUBUETAA ,  RAINAA FUEZAA

IPC: B22F9/20 ,  B22F9/22 ,  G11B5/706 ,  H01F1/047 ,  H01F1/06

Abstract: PURPOSE: To enhance a packing density by incorporating a specific amount or less of nickel in an overall amount of metal particles and simultaneously incorporating a specific value or more of magnetization. CONSTITUTION: The needle-like ferromagnetic metal particles made mainly of iron comprises less than 0.4wt.% of nickel to overall amount of the particles, simultaneously more than 100kA of coercive force magnetic field strength and 120nTm /g or more of magnetization measured by 160kA/m of external magnetic field, zinc, phosphorus and silicon in addition to iron and oxygen and less than 0.1wt.% of nickel to overall amount of the particles. The method for manufacturing the particles comprises the steps of precipitating shape stabilized α-FeOOH, heat treating the α-FeOOH at 500 to 850 deg.C for 30 to 300min, and subsequently reducing the obtained material at 200 to 450 deg.C by using gaseous reducing agent. Thus, the reduction of iron oxide material is simplified by nickel catalytic effect, and magnetic characteristics necessary for high packing density of a magnetic recording carrier of the iron particles can be obtained.