JPS537320B2 - - Google Patents
Info
- Publication number
- JPS537320B2 JPS537320B2 JP5419275A JP5419275A JPS537320B2 JP S537320 B2 JPS537320 B2 JP S537320B2 JP 5419275 A JP5419275 A JP 5419275A JP 5419275 A JP5419275 A JP 5419275A JP S537320 B2 JPS537320 B2 JP S537320B2
- 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.)
- 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
- G11B5/70652—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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
- C01P2002/52—Solid solutions containing elements as dopants
- C01P2002/54—Solid solutions containing elements as dopants one element only
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
- C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46745974A | 1974-05-06 | 1974-05-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50154198A JPS50154198A (xx) | 1975-12-11 |
| JPS537320B2 true JPS537320B2 (xx) | 1978-03-16 |
Family
ID=23855785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5419275A Expired JPS537320B2 (xx) | 1974-05-06 | 1975-05-06 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS537320B2 (xx) |
| CH (1) | CH605414A5 (xx) |
| DE (1) | DE2520379C3 (xx) |
| GB (1) | GB1482157A (xx) |
| NL (1) | NL166244C (xx) |
| SE (1) | SE7505137L (xx) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5942441B2 (ja) * | 1974-08-08 | 1984-10-15 | 富士写真フイルム株式会社 | 磁性酸化鉄の製法 |
| JPS5850005B2 (ja) * | 1974-08-20 | 1983-11-08 | 日立マクセル株式会社 | ジキキロクヨウジセイフンマツノ セイゾウホウ |
| DE2556406A1 (de) * | 1975-12-15 | 1977-06-16 | Bayer Ag | Verfahren zur kontinuierlichen herstellung von eisenoxidhydroxid |
| DE2705967C2 (de) * | 1977-02-12 | 1990-01-04 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
| DE2801395C2 (de) * | 1978-01-13 | 1982-04-22 | Bayer Ag, 5090 Leverkusen | Thermisch stabilisiertes ferrimagnetisches Eisenoxid |
| JPS5852806A (ja) * | 1981-09-24 | 1983-03-29 | Hitachi Maxell Ltd | 磁気記録媒体 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4854497A (xx) * | 1971-11-10 | 1973-07-31 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1226997B (de) * | 1959-06-12 | 1966-10-20 | Bayer Ag | Verfahren zur Herstellung von nadelfoermigem, cobalthaltigem gamma-Eisen(III)-oxid |
| US3573980A (en) * | 1968-02-19 | 1971-04-06 | Minnesota Mining & Mfg | Method of making magnetic particles and recording tape |
| JPS4810994B1 (xx) * | 1969-07-26 | 1973-04-09 |
-
1974
- 1974-10-08 GB GB43625/74A patent/GB1482157A/en not_active Expired
-
1975
- 1975-05-01 NL NL7505145.A patent/NL166244C/xx not_active IP Right Cessation
- 1975-05-02 SE SE7505137A patent/SE7505137L/xx unknown
- 1975-05-05 DE DE2520379A patent/DE2520379C3/de not_active Expired
- 1975-05-06 JP JP5419275A patent/JPS537320B2/ja not_active Expired
- 1975-05-06 CH CH584275A patent/CH605414A5/xx not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4854497A (xx) * | 1971-11-10 | 1973-07-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2520379C3 (de) | 1981-11-19 |
| GB1482157A (en) | 1977-08-10 |
| NL166244B (nl) | 1981-02-16 |
| NL166244C (nl) | 1981-07-15 |
| SE7505137L (sv) | 1975-11-07 |
| NL7505145A (nl) | 1975-11-10 |
| JPS50154198A (xx) | 1975-12-11 |
| DE2520379A1 (de) | 1975-11-13 |
| CH605414A5 (xx) | 1978-09-29 |
| DE2520379B2 (de) | 1980-09-25 |