FR2344107A1 - Oxyde ferrique aciculaire pour l'enregistrement magnetique et procede pour sa fabrication - Google Patents
Oxyde ferrique aciculaire pour l'enregistrement magnetique et procede pour sa fabricationInfo
- Publication number
- FR2344107A1 FR2344107A1 FR7607074A FR7607074A FR2344107A1 FR 2344107 A1 FR2344107 A1 FR 2344107A1 FR 7607074 A FR7607074 A FR 7607074A FR 7607074 A FR7607074 A FR 7607074A FR 2344107 A1 FR2344107 A1 FR 2344107A1
- Authority
- FR
- France
- Prior art keywords
- manufacturing
- magnetic recording
- ferric oxide
- acicular ferric
- acicular
- 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
- G11B5/706—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
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7607074A FR2344107A1 (fr) | 1976-03-12 | 1976-03-12 | Oxyde ferrique aciculaire pour l'enregistrement magnetique et procede pour sa fabrication |
BE175714A BE852362A (fr) | 1976-03-12 | 1977-03-10 | Oxyde ferrique pour l'enregistrement magnetique et procede pour sa fabrication |
GB1044877A GB1552405A (en) | 1976-03-12 | 1977-03-11 | Magnetisable material |
NL7702651A NL7702651A (nl) | 1976-03-12 | 1977-03-11 | Werkwijze ter bereiding van aciculair ferrioxyde voor de magnetische registratie. |
JP2686877A JPS52114499A (en) | 1976-03-12 | 1977-03-11 | Cobalttdoped acicular gammaa ferric oxide crystal process for preparing same and magnetic tape |
DE19772710776 DE2710776A1 (de) | 1976-03-12 | 1977-03-11 | Mit kobalt dotierte acikulare gamma-ferrioxidkristalle sowie verfahren zur herstellung der kristalle und die verwendung derselben |
US05/959,135 US4178416A (en) | 1976-03-12 | 1978-11-09 | Acicular ferric oxide for magnetic recording and process for producing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7607074A FR2344107A1 (fr) | 1976-03-12 | 1976-03-12 | Oxyde ferrique aciculaire pour l'enregistrement magnetique et procede pour sa fabrication |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2344107A1 true FR2344107A1 (fr) | 1977-10-07 |
FR2344107B1 FR2344107B1 (fr) | 1980-04-30 |
Family
ID=9170308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7607074A Granted FR2344107A1 (fr) | 1976-03-12 | 1976-03-12 | Oxyde ferrique aciculaire pour l'enregistrement magnetique et procede pour sa fabrication |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS52114499A (fr) |
BE (1) | BE852362A (fr) |
DE (1) | DE2710776A1 (fr) |
FR (1) | FR2344107A1 (fr) |
GB (1) | GB1552405A (fr) |
NL (1) | NL7702651A (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57501053A (fr) * | 1980-07-16 | 1982-06-10 | ||
JPS5826035A (ja) * | 1981-07-31 | 1983-02-16 | Ishihara Sangyo Kaisha Ltd | コバルト含有磁性酸化鉄の製造方法 |
DE3514008A1 (de) * | 1985-04-18 | 1986-10-23 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung isotroper magnetischer, kobalthaltiger eisenoxide aus eisen (iii)-salzen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD91017A (fr) * | ||||
JPS5120595A (fr) * | 1974-08-11 | 1976-02-18 | Hitachi Maxell | |
JPS5120596A (fr) * | 1974-08-11 | 1976-02-18 | Hitachi Maxell |
-
1976
- 1976-03-12 FR FR7607074A patent/FR2344107A1/fr active Granted
-
1977
- 1977-03-10 BE BE175714A patent/BE852362A/fr not_active IP Right Cessation
- 1977-03-11 DE DE19772710776 patent/DE2710776A1/de not_active Withdrawn
- 1977-03-11 NL NL7702651A patent/NL7702651A/xx not_active Application Discontinuation
- 1977-03-11 GB GB1044877A patent/GB1552405A/en not_active Expired
- 1977-03-11 JP JP2686877A patent/JPS52114499A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD91017A (fr) * | ||||
JPS5120595A (fr) * | 1974-08-11 | 1976-02-18 | Hitachi Maxell | |
JPS5120596A (fr) * | 1974-08-11 | 1976-02-18 | Hitachi Maxell |
Non-Patent Citations (3)
Title |
---|
ABJP/72 * |
CA1973 * |
CA1976 * |
Also Published As
Publication number | Publication date |
---|---|
BE852362A (fr) | 1977-09-12 |
JPS52114499A (en) | 1977-09-26 |
GB1552405A (en) | 1979-09-12 |
FR2344107B1 (fr) | 1980-04-30 |
NL7702651A (nl) | 1977-09-14 |
DE2710776A1 (de) | 1977-09-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |