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：JPH03261620A

公开(公告)日：1991-11-21

申请号：JP41059990

申请日：1990-12-14

Applicant: BASF AG

Inventor： MIHIYAERU BUORUFUGANGU MIYURAA ,  ETSUKEHARUTO SHIYUBUATSUPU ,  HERUMUUTO AUBUETAA ,  RAINAA FUEZAA ,  BERUNHARUTO BETSUCHIYAA ,  NORUBERUTO MIYURAA ,  BUORUFUGANGU KOHANETSUKU

IPC: C01G37/027 ,  C30B29/62 ,  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.

公开(公告)号：JPS62274605A

公开(公告)日：1987-11-28

申请号：JP11493287

申请日：1987-05-13

Applicant: BASF AG

Inventor： EKEHARUTO SHIYUBUAPU ,  BUERUNAA SHIYUTETSUKU ,  BUIRUHERUMU SHIYURESAA ,  RAINAA FUEZAA

IPC: C01G49/02 ,  C01G49/00 ,  G11B5/706 ,  G11B5/712 ,  H01F1/11

公开(公告)号：JPH01226738A

公开(公告)日：1989-09-11

申请号：JP2409289

申请日：1989-02-03

Applicant: BASF AG

Inventor： GUNTAA MAIRU ,  MANFUREETO OORINGAA ,  RAINAA FUEZAA

IPC: C01G49/00 ,  C01G49/02 ,  C04B35/26 ,  H01F1/11

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：JPS616127A

公开(公告)日：1986-01-11

申请号：JP7687385

申请日：1985-04-12

Applicant: BASF AG

Inventor： BUERUNAA SHIYUTEKU ,  RAINAA FUEZAA ,  HERUMUUTO YAKUSHIYU ,  PEETAA RUDORUFU ,  GIYUNTAA FUETO ,  UDO KURUMAN

IPC: C01G49/00 ,  G11B5/706 ,  H01F1/10

公开(公告)号：JPH029724A

公开(公告)日：1990-01-12

申请号：JP2594989

申请日：1989-02-06

Applicant: BASF AG

Inventor： GUNTAA MAIRU ,  MANFUREETO OORINGAA ,  RAINAA FUEZAA

IPC: C01G49/00 ,  G11B5/706 ,  H01F1/11