FR2397049A1 - Procede de fabrication de poudres magnetiques et poudres et supports munis de telles poudres ainsi obtenues - Google Patents
Procede de fabrication de poudres magnetiques et poudres et supports munis de telles poudres ainsi obtenuesInfo
- Publication number
- FR2397049A1 FR2397049A1 FR7819812A FR7819812A FR2397049A1 FR 2397049 A1 FR2397049 A1 FR 2397049A1 FR 7819812 A FR7819812 A FR 7819812A FR 7819812 A FR7819812 A FR 7819812A FR 2397049 A1 FR2397049 A1 FR 2397049A1
- Authority
- FR
- France
- Prior art keywords
- powders
- manufacturing magnetic
- supports equipped
- iron oxide
- oxide particles
- 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.)
- Granted
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
- G11B5/712—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 surface treatment or coating of magnetic particles
-
- 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
Landscapes
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7964577A JPS5413997A (en) | 1977-07-04 | 1977-07-04 | Magnetic recording medium and its manufacture |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2397049A1 true FR2397049A1 (fr) | 1979-02-02 |
FR2397049B1 FR2397049B1 (nl) | 1982-04-02 |
Family
ID=13695840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7819812A Granted FR2397049A1 (fr) | 1977-07-04 | 1978-07-03 | Procede de fabrication de poudres magnetiques et poudres et supports munis de telles poudres ainsi obtenues |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5413997A (nl) |
DE (1) | DE2829344A1 (nl) |
FR (1) | FR2397049A1 (nl) |
GB (1) | GB2001942B (nl) |
NL (1) | NL7807250A (nl) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0014903A1 (de) * | 1979-02-13 | 1980-09-03 | BASF Aktiengesellschaft | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
EP0014902A1 (de) * | 1979-02-13 | 1980-09-03 | BASF Aktiengesellschaft | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2903593C3 (de) * | 1979-01-31 | 1982-05-06 | Bayer Ag, 5090 Leverkusen | Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung |
EP0099259A1 (en) * | 1982-07-09 | 1984-01-25 | Konica Corporation | Process for producing surface-treated ferromagnetic particles |
DE3631193A1 (de) * | 1986-09-13 | 1988-03-24 | Bayer Ag | Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung |
DE3631194A1 (de) * | 1986-09-13 | 1988-03-24 | Bayer Ag | Magnetische eisenoxidpigmente sowie verfahren zu ihrer herstellung |
CN103694746B (zh) * | 2013-12-27 | 2015-11-18 | 广东维诺珠光颜料有限公司 | 一种多功能型导磁合成云母珠光颜料的制备方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1318579A (en) * | 1969-07-26 | 1973-05-31 | Sony Corp | Methods of making acicular cobalt-modified ypsilon-fe2o3 powder |
FR2380225A1 (fr) * | 1977-02-12 | 1978-09-08 | Basf Ag | Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5321119B2 (nl) * | 1973-03-20 | 1978-06-30 | ||
DE2243231C2 (de) * | 1972-09-01 | 1982-01-28 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von Cobalt-dotiertem γ-Eisen(III)oxid |
DE2639250C2 (de) * | 1976-09-01 | 1985-12-12 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid |
-
1977
- 1977-07-04 JP JP7964577A patent/JPS5413997A/ja active Granted
-
1978
- 1978-07-03 FR FR7819812A patent/FR2397049A1/fr active Granted
- 1978-07-04 DE DE19782829344 patent/DE2829344A1/de active Granted
- 1978-07-04 GB GB7828792A patent/GB2001942B/en not_active Expired
- 1978-07-04 NL NL7807250A patent/NL7807250A/nl not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1318579A (en) * | 1969-07-26 | 1973-05-31 | Sony Corp | Methods of making acicular cobalt-modified ypsilon-fe2o3 powder |
FR2380225A1 (fr) * | 1977-02-12 | 1978-09-08 | Basf Ag | Procede de preparation d'oxyde de fer magnetique sous forme d'aiguilles, renfermant du cobalt |
Non-Patent Citations (2)
Title |
---|
CA1975 * |
CA1977 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0014903A1 (de) * | 1979-02-13 | 1980-09-03 | BASF Aktiengesellschaft | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
EP0014902A1 (de) * | 1979-02-13 | 1980-09-03 | BASF Aktiengesellschaft | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
Also Published As
Publication number | Publication date |
---|---|
GB2001942A (en) | 1979-02-14 |
JPS5413997A (en) | 1979-02-01 |
FR2397049B1 (nl) | 1982-04-02 |
JPS6114642B2 (nl) | 1986-04-19 |
NL7807250A (nl) | 1979-01-08 |
DE2829344A1 (de) | 1979-01-25 |
GB2001942B (en) | 1982-02-03 |
DE2829344C2 (nl) | 1989-03-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |