JPS4921695A - - Google Patents
Info
- Publication number
- JPS4921695A JPS4921695A JP48044697A JP4469773A JPS4921695A JP S4921695 A JPS4921695 A JP S4921695A JP 48044697 A JP48044697 A JP 48044697A JP 4469773 A JP4469773 A JP 4469773A JP S4921695 A JPS4921695 A JP S4921695A
- Authority
- JP
- Japan
- 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
- G11B5/706—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
-
- 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
-
- 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
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
- Soft Magnetic Materials (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7214215A FR2180575B1 (de) | 1972-04-21 | 1972-04-21 | |
| FR7301110A FR2213919A2 (en) | 1973-01-12 | 1973-01-12 | Solid solns of gamma-ferric oxide with divalent metals - - for use in magnetic recording tapes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4921695A true JPS4921695A (de) | 1974-02-26 |
| JPS5649856B2 JPS5649856B2 (de) | 1981-11-25 |
Family
ID=26217047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4469773A Expired JPS5649856B2 (de) | 1972-04-21 | 1973-04-21 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5649856B2 (de) |
| CH (1) | CH569676A5 (de) |
| DE (1) | DE2320182C2 (de) |
| GB (1) | GB1432808A (de) |
| IT (1) | IT982802B (de) |
| NL (1) | NL180000C (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63501834A (ja) * | 1985-09-30 | 1988-07-21 | サントル・ナシヨナル・ド・ラ・ルシエルシエ・シヤンテイフイツク・（セ・エ−ヌ・エ−ル・エス） | 間隙スピネル構造の粒状磁性酸化物、その製造方法およびその利用 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4096080A (en) * | 1973-12-26 | 1978-06-20 | Agence Nationale De Valorisation De La Recherche (Anvar) | Solid solutions of magnetic oxides and method of preparation |
| DE2639250C2 (de) * | 1976-09-01 | 1985-12-12 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid |
| 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 |
| DE2935444A1 (de) * | 1979-09-01 | 1981-03-19 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid |
| RU2761198C1 (ru) * | 2021-04-16 | 2021-12-06 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный химико-технологический университет" | Способ получения феррита кобальта |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB679172A (en) * | 1948-04-23 | 1952-09-17 | Standard Telephones Cables Ltd | Improvements in or relating to the production of metal or metal oxide powders and products therefrom |
| US3317574A (en) * | 1961-07-21 | 1967-05-02 | Sony Corp | Method of making finely divided ferrous metal salts of organic acids |
-
1973
- 1973-04-11 NL NL7305050A patent/NL180000C/xx not_active IP Right Cessation
- 1973-04-19 IT IT2319773A patent/IT982802B/it active
- 1973-04-19 GB GB1888473A patent/GB1432808A/en not_active Expired
- 1973-04-19 DE DE19732320182 patent/DE2320182C2/de not_active Expired
- 1973-04-19 CH CH572173A patent/CH569676A5/xx not_active IP Right Cessation
- 1973-04-21 JP JP4469773A patent/JPS5649856B2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63501834A (ja) * | 1985-09-30 | 1988-07-21 | サントル・ナシヨナル・ド・ラ・ルシエルシエ・シヤンテイフイツク・（セ・エ−ヌ・エ−ル・エス） | 間隙スピネル構造の粒状磁性酸化物、その製造方法およびその利用 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5649856B2 (de) | 1981-11-25 |
| NL7305050A (de) | 1973-10-23 |
| DE2320182A1 (de) | 1973-10-31 |
| GB1432808A (en) | 1976-04-22 |
| CH569676A5 (de) | 1975-11-28 |
| IT982802B (it) | 1974-10-21 |
| NL180000C (nl) | 1986-12-16 |
| DE2320182C2 (de) | 1982-07-01 |