JPS6334608B2 - - Google Patents

Info

Publication number
JPS6334608B2
JPS6334608B2 JP56114107A JP11410781A JPS6334608B2 JP S6334608 B2 JPS6334608 B2 JP S6334608B2 JP 56114107 A JP56114107 A JP 56114107A JP 11410781 A JP11410781 A JP 11410781A JP S6334608 B2 JPS6334608 B2 JP S6334608B2
Authority
JP
Japan
Prior art keywords
feooh
reaction
crystals
alkali
amount
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
Application number
JP56114107A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5825202A (ja
Inventor
Kazuo Nakada
Tsuneo Ishikawa
Taro Amamoto
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.)
Ishihara Sangyo Kaisha Ltd
Original Assignee
Ishihara Sangyo Kaisha Ltd
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 Ishihara Sangyo Kaisha Ltd filed Critical Ishihara Sangyo Kaisha Ltd
Priority to JP56114107A priority Critical patent/JPS5825202A/ja
Publication of JPS5825202A publication Critical patent/JPS5825202A/ja
Publication of JPS6334608B2 publication Critical patent/JPS6334608B2/ja
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
    • G11B5/70652—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 gamma - Fe2 O3
    • G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents

Landscapes

  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)
JP56114107A 1981-07-21 1981-07-21 磁気記録材料用針状α−ＦｅＯＯＨの製造方法 Granted JPS5825202A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56114107A JPS5825202A (ja) 1981-07-21 1981-07-21 磁気記録材料用針状α−ＦｅＯＯＨの製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56114107A JPS5825202A (ja) 1981-07-21 1981-07-21 磁気記録材料用針状α−ＦｅＯＯＨの製造方法

Publications (2)

Publication Number Publication Date
JPS5825202A JPS5825202A (ja) 1983-02-15
JPS6334608B2 true JPS6334608B2 (OSRAM) 1988-07-11

Family

ID=14629291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56114107A Granted JPS5825202A (ja) 1981-07-21 1981-07-21 磁気記録材料用針状α−ＦｅＯＯＨの製造方法

Country Status (1)

Country Link
JP (1) JPS5825202A (OSRAM)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6090831A (ja) * 1983-10-25 1985-05-22 Toyo Soda Mfg Co Ltd α−オキシ水酸化鉄の製法
JP2937211B2 (ja) * 1991-05-31 1999-08-23 戸田工業株式会社 針状磁性酸化鉄粒子粉末の製造法
US5641470A (en) * 1995-07-17 1997-06-24 Minnesota Mining And Manufacturing Company Process for making goethite
JPH10101339A (ja) * 1996-09-27 1998-04-21 Titan Kogyo Kk マグネタイト粒子粉末及びその製造方法並びにその応用

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398094A1 (fr) * 1977-07-22 1979-02-16 Ugine Kuhlmann Nouveaux colorants de dispersion, leur preparation et leur application a la coloration des matieres artificielles ou synthetiques
IT1159851B (it) * 1978-06-20 1987-03-04 Cselt Centro Studi Lab Telecom Perfezionamenti ai sistemi di trasmissione a divisione di lunghezza d'onda
JPS558461A (en) * 1978-07-05 1980-01-22 Nachi Fujikoshi Corp Alloy steel tool for cutting
JPS5523217A (en) * 1978-08-03 1980-02-19 Paramount Glass Mfg Co Ltd Method of insulating heat on top of ceiling
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung

Also Published As

Publication number Publication date
JPS5825202A (ja) 1983-02-15

Similar Documents

Publication Publication Date Title
JPS6311763B2 (OSRAM)
JPS6334608B2 (OSRAM)
JPS6135135B2 (OSRAM)
US6140001A (en) Iron oxide microparticles and a process for producing them
KR890003881B1 (ko) 코발트 및 제 1 철 함유 강자성 산화철의 제조방법
JP2937211B2 (ja) 針状磁性酸化鉄粒子粉末の製造法
JPS639735B2 (OSRAM)
JP3337046B2 (ja) コバルトと鉄とを主成分とする紡錘状金属磁性粒子粉末及びその製造法
JP2885253B2 (ja) 紡錘状を呈したゲータイト粒子粉末の製造法
JP3087778B2 (ja) 針状ゲータイト粒子粉末の製造法
JPS6332243B2 (OSRAM)
JPH0518766B2 (OSRAM)
JPH0415601B2 (OSRAM)
JPS63162535A (ja) 針状ヘマタイト粒子粉末の製造法
JPH0160923B2 (OSRAM)
JPH0692641A (ja) 針状γ−ＦｅＯＯＨの製造方法
JP3087780B2 (ja) 針状ゲータイト粒子粉末の製造法
JP3055308B2 (ja) 針状磁性酸化鉄粒子粉末の製造法
JPH043902A (ja) 磁気記録用針状磁性酸化鉄粒子粉末及びその製造法
JPS59562B2 (ja) 強磁性金属粉末およびその製造方法
JPH0725619A (ja) 紡錘形を呈した磁性酸化鉄粒子粉末の製造法
JPH0532421A (ja) 針状磁性酸化鉄粒子粉末の製造法
JPS5951498B2 (ja) 針状晶α−ＦｅＯＯＨ粒子粉末の製造法
JPH0529611B2 (OSRAM)
JPS6132260B2 (OSRAM)