JPH033361B2 - - Google Patents
Info
- Publication number
- JPH033361B2 JPH033361B2 JP56153753A JP15375381A JPH033361B2 JP H033361 B2 JPH033361 B2 JP H033361B2 JP 56153753 A JP56153753 A JP 56153753A JP 15375381 A JP15375381 A JP 15375381A JP H033361 B2 JPH033361 B2 JP H033361B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- temperature
- powder
- precipitate
- hexagonal ferrite
- 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
- 230000005291 magnetic effect Effects 0.000 claims description 24
- 229910000859 α-Fe Inorganic materials 0.000 claims description 24
- 239000002244 precipitate Substances 0.000 claims description 18
- 239000006247 magnetic powder Substances 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000012670 alkaline solution Substances 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910052788 barium Inorganic materials 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052712 strontium Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 230000005415 magnetization Effects 0.000 description 19
- 239000000843 powder Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 15
- 239000007864 aqueous solution Substances 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 239000011882 ultra-fine particle Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910020517 Co—Ti Inorganic materials 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910001422 barium ion Inorganic materials 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- AZEGRRQOQSUJJK-UHFFFAOYSA-N nitrate;hydrochloride Chemical class Cl.[O-][N+]([O-])=O AZEGRRQOQSUJJK-UHFFFAOYSA-N 0.000 description 1
- -1 organic acid salts Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 159000000008 strontium salts Chemical class 0.000 description 1
- 239000006228 supernatant Substances 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
- G11B5/70678—Ferrites
Landscapes
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56153753A JPS5856302A (ja) | 1981-09-30 | 1981-09-30 | 高密度磁気記録用磁性粉の製造方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56153753A JPS5856302A (ja) | 1981-09-30 | 1981-09-30 | 高密度磁気記録用磁性粉の製造方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5856302A JPS5856302A (ja) | 1983-04-04 |
| JPH033361B2 true JPH033361B2 (pl) | 1991-01-18 |
Family
ID=15569362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56153753A Granted JPS5856302A (ja) | 1981-09-30 | 1981-09-30 | 高密度磁気記録用磁性粉の製造方法 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5856302A (pl) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59207605A (ja) * | 1983-05-11 | 1984-11-24 | Tohoku Metal Ind Ltd | 磁気記録用粉末の製造方法 |
| JPS6069822A (ja) * | 1983-08-19 | 1985-04-20 | Toshiba Corp | 磁気記録媒体 |
| JPS6055516A (ja) * | 1983-09-06 | 1985-03-30 | Toshiba Corp | 磁気記録媒体 |
| JPS6095902A (ja) * | 1983-10-31 | 1985-05-29 | Toda Kogyo Corp | 磁気記録用板状Ｂａフエライト微粒子粉末の製造法 |
| JPH061546B2 (ja) * | 1985-03-26 | 1994-01-05 | 株式会社東芝 | 磁気記録媒体用強磁性粉末及びその製造方法 |
| JPS62176920A (ja) * | 1986-01-31 | 1987-08-03 | Sony Corp | バリウムフエライト粉末の製法 |
| JPH0761874B2 (ja) * | 1986-09-12 | 1995-07-05 | 戸田工業株式会社 | 磁気記録用板状Ｂａフエライト微粒子粉末及びその製造法 |
| US5585032A (en) * | 1987-04-21 | 1996-12-17 | Ishihara Sangyo Kaisha, Ltd. | Ferromagnetic fine powder for magnetic recording |
| US5378384A (en) * | 1991-09-19 | 1995-01-03 | Minnesota Mining And Manufacturing Company | Process of making hexagonal magnetic ferrite pigment for high density magnetic recording applications |
| US5616414A (en) * | 1993-12-28 | 1997-04-01 | Imation Corp. | Hexagonal magnetic ferrite pigment for high density magnetic recording applications |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5586103A (en) * | 1978-12-22 | 1980-06-28 | Toshiba Corp | High density magnetic recording unit |
-
1981
- 1981-09-30 JP JP56153753A patent/JPS5856302A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5586103A (en) * | 1978-12-22 | 1980-06-28 | Toshiba Corp | High density magnetic recording unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5856302A (ja) | 1983-04-04 |
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