JPH0230563B2 - - Google Patents
Info
- Publication number
- JPH0230563B2 JPH0230563B2 JP57207048A JP20704882A JPH0230563B2 JP H0230563 B2 JPH0230563 B2 JP H0230563B2 JP 57207048 A JP57207048 A JP 57207048A JP 20704882 A JP20704882 A JP 20704882A JP H0230563 B2 JPH0230563 B2 JP H0230563B2
- Authority
- JP
- Japan
- Prior art keywords
- cobalt
- magnetic
- iron oxide
- coating
- metal hydroxide
- 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 - Lifetime
Links
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 52
- 229910017052 cobalt Inorganic materials 0.000 claims description 37
- 239000010941 cobalt Substances 0.000 claims description 37
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 37
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 229910052788 barium Inorganic materials 0.000 claims description 3
- 150000004679 hydroxides Chemical class 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 229910052712 strontium Inorganic materials 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 19
- 238000000576 coating method Methods 0.000 description 19
- 229910000000 metal hydroxide Inorganic materials 0.000 description 18
- 150000004692 metal hydroxides Chemical class 0.000 description 18
- 239000011230 binding agent Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 13
- 239000006247 magnetic powder Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000000843 powder Substances 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000000151 deposition Methods 0.000 description 6
- 239000004094 surface-active agent Substances 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- -1 ferrous compound Chemical class 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000002184 metal Chemical class 0.000 description 4
- 229910052751 metal Chemical class 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 150000001869 cobalt compounds Chemical class 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 150000002506 iron compounds Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- JLPULHDHAOZNQI-ZTIMHPMXSA-N 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCC\C=C/C\C=C/CCCCC JLPULHDHAOZNQI-ZTIMHPMXSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 101100496858 Mus musculus Colec12 gene Proteins 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 229940044175 cobalt sulfate Drugs 0.000 description 1
- 229910000361 cobalt sulfate Inorganic materials 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229940083466 soybean lecithin Drugs 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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
Landscapes
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57207048A JPS5998503A (ja) | 1982-11-26 | 1982-11-26 | コバルト含有磁性酸化鉄 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57207048A JPS5998503A (ja) | 1982-11-26 | 1982-11-26 | コバルト含有磁性酸化鉄 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5998503A JPS5998503A (ja) | 1984-06-06 |
| JPH0230563B2 true JPH0230563B2 (fr) | 1990-07-06 |
Family
ID=16533337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57207048A Granted JPS5998503A (ja) | 1982-11-26 | 1982-11-26 | コバルト含有磁性酸化鉄 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5998503A (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01184801A (ja) * | 1988-01-13 | 1989-07-24 | Showa Denko Kk | 磁気記録用磁性酸化鉄粉の製造法 |
| JP3427871B2 (ja) * | 1996-06-24 | 2003-07-22 | 戸田工業株式会社 | コバルト被着型針状磁性酸化鉄粒子粉末 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976402A (ja) * | 1982-10-25 | 1984-05-01 | Toda Kogyo Corp | 磁気記録媒体用磁性酸化鉄粒子粉末の製造法 |
-
1982
- 1982-11-26 JP JP57207048A patent/JPS5998503A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976402A (ja) * | 1982-10-25 | 1984-05-01 | Toda Kogyo Corp | 磁気記録媒体用磁性酸化鉄粒子粉末の製造法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5998503A (ja) | 1984-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4539261A (en) | Process for producing magnetic powder and product | |
| US4778734A (en) | Barium ferrite magnetic powder and magnetic recording medium containing the same | |
| JPH0217603B2 (fr) | ||
| JPS6332242B2 (fr) | ||
| JPS6242337B2 (fr) | ||
| JPS59107924A (ja) | コバルト含有磁性酸化鉄粉末の製造方法 | |
| JPS5856232A (ja) | 磁気記録媒体 | |
| JPS6149251B2 (fr) | ||
| JPS6331085B2 (fr) | ||
| JPH0230563B2 (fr) | ||
| JPS5923505A (ja) | 磁性粉末 | |
| JPH037121B2 (fr) | ||
| JPH0755832B2 (ja) | コバルト含有強磁性酸化鉄粉末の製造方法 | |
| JPH0480522B2 (fr) | ||
| JPH0755829B2 (ja) | 磁性粒子粉末及びその製造法 | |
| JPS6132259B2 (fr) | ||
| JPS6331086B2 (fr) | ||
| JPH0157482B2 (fr) | ||
| JPH0425686B2 (fr) | ||
| JPH0425687B2 (fr) | ||
| JP2897794B2 (ja) | コバルト被着型磁性酸化鉄粒子粉末の製造法 | |
| JPH0430162B2 (fr) | ||
| JPS59169937A (ja) | 磁性粉末の製造方法 | |
| JPH0521321B2 (fr) | ||
| JPS61132521A (ja) | 磁気記録媒体用磁性酸化鉄粒子粉末及びその製造法 |