DE2920733C2 - - Google Patents

Info

Publication number
DE2920733C2
DE2920733C2 DE2920733A DE2920733A DE2920733C2 DE 2920733 C2 DE2920733 C2 DE 2920733C2 DE 2920733 A DE2920733 A DE 2920733A DE 2920733 A DE2920733 A DE 2920733A DE 2920733 C2 DE2920733 C2 DE 2920733C2
Authority
DE
Germany
Prior art keywords
iron
particles
atomic
cobalt
iii
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE2920733A
Other languages
German (de)
English (en)
Other versions
DE2920733A1 (de
Inventor
Guy Christopher City Of Tucson Ariz. Us Marcot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAGNOX INC., WILMINGTON, DEL., US
Original Assignee
MAGNOX Inc WILMINGTON DEL US
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAGNOX Inc WILMINGTON DEL US filed Critical MAGNOX Inc WILMINGTON DEL US
Publication of DE2920733A1 publication Critical patent/DE2920733A1/de
Application granted granted Critical
Publication of DE2920733C2 publication Critical patent/DE2920733C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
DE19792920733 1978-05-22 1979-05-22 Eisen (ii, iii)oxide, verfahren zu ihrer herstellung und ihre verwendung Granted DE2920733A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/908,348 US4209412A (en) 1978-05-22 1978-05-22 Process for producing nonstoichiometric ferroso-ferric oxides

Publications (2)

Publication Number Publication Date
DE2920733A1 DE2920733A1 (de) 1979-11-29
DE2920733C2 true DE2920733C2 (US06420036-20020716-C00037.png) 1990-09-06

Family

ID=25425637

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792920733 Granted DE2920733A1 (de) 1978-05-22 1979-05-22 Eisen (ii, iii)oxide, verfahren zu ihrer herstellung und ihre verwendung

Country Status (6)

Country Link
US (1) US4209412A (US06420036-20020716-C00037.png)
JP (1) JPS54152699A (US06420036-20020716-C00037.png)
DE (1) DE2920733A1 (US06420036-20020716-C00037.png)
FR (1) FR2426955B1 (US06420036-20020716-C00037.png)
GB (1) GB2021089B (US06420036-20020716-C00037.png)
NL (1) NL190112C (US06420036-20020716-C00037.png)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935444A1 (de) * 1979-09-01 1981-03-19 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid
JPS5677926A (en) * 1979-11-28 1981-06-26 Tdk Corp Magnetic recording medium using cobalt adhesion type iron oxide
DE3637805A1 (de) * 1985-11-06 1987-07-16 Tdk Corp Magnetischer aufzeichnungstraeger
JP2582764B2 (ja) * 1986-02-05 1997-02-19 バスフ アクチェン ゲゼルシャフト 本質的に鉄から成る針状強磁性金属粉末の製造方法
US5069216A (en) * 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
US5219554A (en) * 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
MY107614A (en) * 1990-09-26 1996-05-15 Ishihara Sangyo Kaisha Acicular ferromagnetic iron oxide particles and process for producing the same
CA2175466A1 (en) * 1993-11-01 1995-05-11 Jean A. Lown Process for making goethite
US5814164A (en) * 1994-11-09 1998-09-29 American Scientific Materials Technologies L.P. Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures
US6461562B1 (en) 1999-02-17 2002-10-08 American Scientific Materials Technologies, Lp Methods of making sintered metal oxide articles
US6962685B2 (en) * 2002-04-17 2005-11-08 International Business Machines Corporation Synthesis of magnetite nanoparticles and the process of forming Fe-based nanomaterials
DE10331439B3 (de) * 2003-07-10 2005-02-03 Micromod Partikeltechnologie Gmbh Magnetische Nanopartikel mit verbesserten Magneteigenschaften
JP6380380B2 (ja) * 2013-03-29 2018-08-29 戸田工業株式会社 耐熱性黄色含水酸化鉄顔料の製造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573980A (en) * 1968-02-19 1971-04-06 Minnesota Mining & Mfg Method of making magnetic particles and recording tape
JPS5242363B2 (US06420036-20020716-C00037.png) * 1973-03-20 1977-10-24
US3931025A (en) * 1973-09-21 1976-01-06 Bayer Aktiengesellschaft Magnetic iron oxides with improved orientability and a process for their production
JPS5820125B2 (ja) * 1974-09-20 1983-04-21 富士写真フイルム株式会社 磁気記録体
DE2507420A1 (de) * 1975-02-21 1976-08-26 Bayer Ag Remanenzstabilisierte hochkoerzitive cobalthaltige magnetische eisenoxide
JPS608606B2 (ja) * 1975-07-02 1985-03-04 富士写真フイルム株式会社 強磁性粉末の製法
DE2625106C2 (de) * 1976-06-04 1982-03-11 Bayer Ag, 5090 Leverkusen Eisenoxidschwarz-Pigmente mit verbesserter Oxidationsbeständigkeit und Verfahren zu ihrer Herstellung
DE2639250C2 (de) * 1976-09-01 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid
US4053325A (en) * 1976-09-14 1977-10-11 Pfizer Inc. Heat stable iron oxides

Also Published As

Publication number Publication date
GB2021089B (en) 1982-06-30
DE2920733A1 (de) 1979-11-29
JPH0134935B2 (US06420036-20020716-C00037.png) 1989-07-21
GB2021089A (en) 1979-11-28
NL7903960A (nl) 1979-11-26
FR2426955B1 (fr) 1988-07-01
NL190112C (nl) 1993-11-01
NL190112B (nl) 1993-06-01
FR2426955A1 (fr) 1979-12-21
US4209412A (en) 1980-06-24
JPS54152699A (en) 1979-12-01

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Legal Events

Date Code Title Description
8128 New person/name/address of the agent

Representative=s name: LEDERER, F., DIPL.-CHEM. DR., PAT.-ANW., 8000 MUEN

8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: MAGNOX INC., WILMINGTON, DEL., US

8128 New person/name/address of the agent

Representative=s name: LEDERER, F., DIPL.-CHEM. DR., 8000 MUENCHEN RIEDER

D2 Grant after examination
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8339 Ceased/non-payment of the annual fee