公开(公告)号：JP2002097020A

公开(公告)日：2002-04-02

申请号：JP2001277009

申请日：2001-09-12

Applicant: EMTEC MAGNETICS GMBH ,  HOYA CORP

Inventor： JACHOW HARALD ,  SCHWAB EKKEHARD ,  KOERNER REINHARD ,  MUELLER NORBERT ,  LEHNERT RUDI ,  OHLINGER MANFRED ,  AUWETER HELMUT ,  JAKUSCH HELMUT DR ,  VEITCH RONALD J ,  BOBRICH MICHAEL ,  YOSHIKUNI KEISUKE ,  KAMISAKI ATSUSHI ,  TOMA YOJI ,  TSUKADA SHOGO

IPC: C01G37/027 ,  C09D5/23 ,  G11B5/706 ,  G11B5/73

Abstract: PROBLEM TO BE SOLVED: To provide a method of producing acicular chromium dioxide having high coercive force, short particle length and narrow particular size distribution. SOLUTION: The method of producing chromium dioxide modified by iron and tellurium or antimony and having coercive force of >60 kA/m, saturation magnetization of >85 nTm3/g and average particle length of

公开(公告)号：AU1440097A

公开(公告)日：1997-08-11

申请号：AU1440097

申请日：1997-01-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： POGANIUCH PETER ,  SCHWAB EKKEHARD ,  DAUSCH WILMA M ,  KORNER REINHARD ,  WIMBERSKY WERNER

IPC: G11B5/706 ,  H01F1/047 ,  H01F1/06

Abstract: PCT No. PCT/EP97/00062 Sec. 371 Date Jul. 13, 1998 Sec. 102(e) Date Jul. 13, 1998 PCT Filed Jan. 9, 1997 PCT Pub. No. WO97/26666 PCT Pub. Date Jul. 24, 1997The present invention relates to phosphorus-containing ferromagnetic pigments comprising, in particular, from 30 to 70% by volume of a core, said core comprising essentially iron and cobalt, and from 30 to 70% of a shell, said shell comprising essentially aluminum, phosporus, silicon, oxygen, and optionally magnesium and sodium; the invention further relates to a process for preparation of said pigments, their use in magnetic recording materials and magnetic recording materials which contain such pigments.

公开(公告)号：PL184008B1

公开(公告)日：2002-08-30

申请号：PL32816997

申请日：1997-01-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： POGANIUCH PETER ,  SCHWAB EKKEHARD ,  DAUSCH WILMA M ,  KOERNER REINHARD ,  WIMBERSKY WERNER

IPC: G11B5/706 ,  H01F1/047 ,  H01F1/06

Abstract: PCT No. PCT/EP97/00062 Sec. 371 Date Jul. 13, 1998 Sec. 102(e) Date Jul. 13, 1998 PCT Filed Jan. 9, 1997 PCT Pub. No. WO97/26666 PCT Pub. Date Jul. 24, 1997The present invention relates to phosphorus-containing ferromagnetic pigments comprising, in particular, from 30 to 70% by volume of a core, said core comprising essentially iron and cobalt, and from 30 to 70% of a shell, said shell comprising essentially aluminum, phosporus, silicon, oxygen, and optionally magnesium and sodium; the invention further relates to a process for preparation of said pigments, their use in magnetic recording materials and magnetic recording materials which contain such pigments.

公开(公告)号：BR9707040A

公开(公告)日：1999-06-15

申请号：BR9707040

申请日：1997-01-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： POGANIUCH PETER ,  SCHWAB EKKEHARD ,  DAUSCH WILMA M ,  KORNER REINHARD ,  WIMBERSKY WERNER

IPC: G11B5/706 ,  H01F1/047 ,  H01F1/06

Abstract: PCT No. PCT/EP97/00062 Sec. 371 Date Jul. 13, 1998 Sec. 102(e) Date Jul. 13, 1998 PCT Filed Jan. 9, 1997 PCT Pub. No. WO97/26666 PCT Pub. Date Jul. 24, 1997The present invention relates to phosphorus-containing ferromagnetic pigments comprising, in particular, from 30 to 70% by volume of a core, said core comprising essentially iron and cobalt, and from 30 to 70% of a shell, said shell comprising essentially aluminum, phosporus, silicon, oxygen, and optionally magnesium and sodium; the invention further relates to a process for preparation of said pigments, their use in magnetic recording materials and magnetic recording materials which contain such pigments.

公开(公告)号：DE59707729D1

公开(公告)日：2002-08-22

申请号：DE59707729

申请日：1997-01-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： POGANIUCH PETER ,  SCHWAB EKKEHARD ,  DAUSCH M ,  KOERNER REINHARD ,  WIMBERSKY WERNER

IPC: G11B5/706 ,  H01F1/047 ,  H01F1/06

Abstract: PCT No. PCT/EP97/00062 Sec. 371 Date Jul. 13, 1998 Sec. 102(e) Date Jul. 13, 1998 PCT Filed Jan. 9, 1997 PCT Pub. No. WO97/26666 PCT Pub. Date Jul. 24, 1997The present invention relates to phosphorus-containing ferromagnetic pigments comprising, in particular, from 30 to 70% by volume of a core, said core comprising essentially iron and cobalt, and from 30 to 70% of a shell, said shell comprising essentially aluminum, phosporus, silicon, oxygen, and optionally magnesium and sodium; the invention further relates to a process for preparation of said pigments, their use in magnetic recording materials and magnetic recording materials which contain such pigments.

公开(公告)号：EA000949B1

公开(公告)日：2000-06-26

申请号：EA199800625

申请日：1997-01-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： POGANIUCH PETER ,  SCHWAB EKKEHARD ,  DAUSCH WILMA ,  KORNER REINHARD ,  WIMBERSKY WERNER

IPC: G11B5/706 ,  H01F1/047 ,  H01F1/06

公开(公告)号：PL328169A1

公开(公告)日：1999-01-18

申请号：PL32816997

申请日：1997-01-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： POGANIUCH PETER ,  SCHWAB EKKEHARD ,  DAUSCH WILMA M ,  KOERNER REINHARD ,  WIMBERSKY WERNER

IPC: G11B5/706 ,  H01F1/047 ,  H01F1/06

Abstract: PCT No. PCT/EP97/00062 Sec. 371 Date Jul. 13, 1998 Sec. 102(e) Date Jul. 13, 1998 PCT Filed Jan. 9, 1997 PCT Pub. No. WO97/26666 PCT Pub. Date Jul. 24, 1997The present invention relates to phosphorus-containing ferromagnetic pigments comprising, in particular, from 30 to 70% by volume of a core, said core comprising essentially iron and cobalt, and from 30 to 70% of a shell, said shell comprising essentially aluminum, phosporus, silicon, oxygen, and optionally magnesium and sodium; the invention further relates to a process for preparation of said pigments, their use in magnetic recording materials and magnetic recording materials which contain such pigments.