FR2510804B1 - Procede de preparation d'un oxyde de fer ferromagnetique contenant du cobalt - Google Patents
Procede de preparation d'un oxyde de fer ferromagnetique contenant du cobaltInfo
- Publication number
- FR2510804B1 FR2510804B1 FR8213098A FR8213098A FR2510804B1 FR 2510804 B1 FR2510804 B1 FR 2510804B1 FR 8213098 A FR8213098 A FR 8213098A FR 8213098 A FR8213098 A FR 8213098A FR 2510804 B1 FR2510804 B1 FR 2510804B1
- Authority
- FR
- France
- Prior art keywords
- preparation
- iron oxide
- oxide containing
- containing cobalt
- ferromagnetic iron
- 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
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
-
- 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
- G11B5/70668—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 containing a dopant
- G11B5/70673—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 containing a dopant containing Co
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56117945A JPS5832027A (ja) | 1981-07-28 | 1981-07-28 | コバルト含有酸化鉄強磁性粉末の製造方法 |
JP56159620A JPS5860630A (ja) | 1981-10-07 | 1981-10-07 | コバルト含有強磁性酸化鉄の製造方法 |
JP56186453A JPS5888122A (ja) | 1981-11-20 | 1981-11-20 | コバルト含有強磁性酸化鉄の製造方法 |
JP56201958A JPS58103105A (ja) | 1981-12-15 | 1981-12-15 | コバルト含有強磁性酸化鉄の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2510804A1 FR2510804A1 (fr) | 1983-02-04 |
FR2510804B1 true FR2510804B1 (fr) | 1987-06-26 |
Family
ID=27470475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8213098A Expired FR2510804B1 (fr) | 1981-07-28 | 1982-07-27 | Procede de preparation d'un oxyde de fer ferromagnetique contenant du cobalt |
Country Status (8)
Country | Link |
---|---|
US (1) | US4414245A (fr) |
KR (1) | KR890001485B1 (fr) |
AU (1) | AU548794B2 (fr) |
CA (1) | CA1193175A (fr) |
DE (1) | DE3228021A1 (fr) |
FR (1) | FR2510804B1 (fr) |
GB (1) | GB2105313B (fr) |
NL (1) | NL190910C (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU555302B2 (en) * | 1981-12-25 | 1986-09-18 | Ishihara Sangyo Kaisha Ltd. | Cobalt containing iron oxide powder |
JPS59107924A (ja) * | 1982-12-08 | 1984-06-22 | Ishihara Sangyo Kaisha Ltd | コバルト含有磁性酸化鉄粉末の製造方法 |
JPS59207024A (ja) * | 1983-05-10 | 1984-11-24 | Konishiroku Photo Ind Co Ltd | 磁気記録媒体 |
US4683167A (en) * | 1984-06-25 | 1987-07-28 | Ampex Corporation | Magnetic iron oxide pigment and recording media |
US5271969A (en) * | 1985-10-29 | 1993-12-21 | Atsushi Ogura | Method of manufacturing metal oxide ceramic composite powder |
DE3631194A1 (de) * | 1986-09-13 | 1988-03-24 | Bayer Ag | Magnetische eisenoxidpigmente sowie verfahren zu ihrer herstellung |
DE3631193A1 (de) * | 1986-09-13 | 1988-03-24 | Bayer Ag | Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung |
JPH02263407A (ja) * | 1989-04-04 | 1990-10-26 | Showa Denko Kk | 磁気記録用磁性酸化鉄粉の連続製造法と装置 |
DE3912976A1 (de) * | 1989-04-20 | 1990-10-25 | Basf Ag | Nadelfoermige, kobaltmodifizierte eisenoxide und verfahren zu ihrer herstellung |
DE4320428A1 (de) * | 1993-06-21 | 1994-12-22 | Abb Management Ag | Sondendurchführung für eine Brennkammer |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB721630A (en) | 1951-08-29 | 1955-01-12 | Anorgana Gmbh | Method for the production of ª†-fe o of improved magnetic properties |
US3725126A (en) * | 1968-02-19 | 1973-04-03 | Minnesota Mining & Mfg | Magnetic recording tape |
US4122216A (en) * | 1971-10-19 | 1978-10-24 | Hitachi Maxell, Ltd. | Ferro-magnetic acicular particles for recording medium and process for preparing the same |
BE792847A (fr) | 1971-12-17 | 1973-06-15 | Bayer Ag | Procede de preparation d'oxydes de fer magnetiques aciculaires |
JPS5529577B2 (fr) | 1972-02-04 | 1980-08-05 | ||
JPS5523450B2 (fr) * | 1974-08-13 | 1980-06-23 | ||
JPS5219154A (en) * | 1975-08-06 | 1977-02-14 | Hitachi Maxell | Method for manufacture of magnetic powder |
DE2650890C2 (de) | 1976-11-06 | 1985-12-12 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem, magnetischem Eisenoxid |
DE2705967C2 (de) * | 1977-02-12 | 1990-01-04 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
JPS54106895A (en) * | 1978-02-08 | 1979-08-22 | Fuji Photo Film Co Ltd | Ferromagnetic powder |
DE2905352A1 (de) * | 1979-02-13 | 1980-08-21 | Basf Ag | Verfahren zur herstellung von nadelfoermigem kobalthaltigem magnetischem eisenoxid |
DE2935444A1 (de) * | 1979-09-01 | 1981-03-19 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid |
-
1982
- 1982-07-21 AU AU86252/82A patent/AU548794B2/en not_active Ceased
- 1982-07-23 US US06/401,214 patent/US4414245A/en not_active Expired - Lifetime
- 1982-07-27 GB GB08221655A patent/GB2105313B/en not_active Expired
- 1982-07-27 CA CA000408192A patent/CA1193175A/fr not_active Expired
- 1982-07-27 KR KR8203349A patent/KR890001485B1/ko active
- 1982-07-27 DE DE19823228021 patent/DE3228021A1/de active Granted
- 1982-07-27 NL NL8203006A patent/NL190910C/xx not_active IP Right Cessation
- 1982-07-27 FR FR8213098A patent/FR2510804B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL190910B (nl) | 1994-05-16 |
NL190910C (nl) | 1994-10-17 |
US4414245A (en) | 1983-11-08 |
DE3228021A1 (de) | 1983-02-17 |
KR840000435A (ko) | 1984-02-22 |
AU548794B2 (en) | 1986-01-02 |
FR2510804A1 (fr) | 1983-02-04 |
AU8625282A (en) | 1983-02-03 |
DE3228021C2 (fr) | 1989-03-09 |
KR890001485B1 (ko) | 1989-05-04 |
NL8203006A (nl) | 1983-02-16 |
GB2105313A (en) | 1983-03-23 |
CA1193175A (fr) | 1985-09-10 |
GB2105313B (en) | 1985-05-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse | ||
ST | Notification of lapse | ||
ST | Notification of lapse |