JPS6435901A - Magnetic powder and manufacture thereof - Google Patents
Magnetic powder and manufacture thereofInfo
- Publication number
- JPS6435901A JPS6435901A JP62190802A JP19080287A JPS6435901A JP S6435901 A JPS6435901 A JP S6435901A JP 62190802 A JP62190802 A JP 62190802A JP 19080287 A JP19080287 A JP 19080287A JP S6435901 A JPS6435901 A JP S6435901A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- indicates
- ferrite
- range
- kinds
- 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.)
- Pending
Links
- 239000006247 magnetic powder Substances 0.000 title abstract 5
- 238000004519 manufacturing process Methods 0.000 title 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 4
- WOIHABYNKOEWFG-UHFFFAOYSA-N [Sr].[Ba] Chemical compound [Sr].[Ba] WOIHABYNKOEWFG-UHFFFAOYSA-N 0.000 abstract 2
- 230000005415 magnetization Effects 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229920006395 saturated elastomer Polymers 0.000 abstract 2
- 229910052732 germanium Inorganic materials 0.000 abstract 1
- 229910052735 hafnium Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
Landscapes
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE:To increase the saturated magnetization and to obtain the coercive force of a suitable range by a method wherein the title magnetic powder is formed with the specific hexagonal barium strontium ferrite. CONSTITUTION:The title magnetic powder is composed of the hexagonal barium strontium ferrite indicated by the formula of Ba1-ySryFe12-2xMxM'xO19 (M indicates one or more kinds of metal element selected from Co, Ni and Zn, M' indicates one or more kinds of metal element selected from Ti, Ge, Nb, V, Zr and Hf, x indicates the positive number in the range of 0.4-1.2, y indicates the positive number in the range of 0.03-0.8.) A Ba element and an Sr element coexist in a suitable range as fundamental components of hexagonal ferrite, and the Sr element is substituted for the position of the Ba atoms in a molecular structure, said magnetic powder has excellent characteristics as the high density magnetic recording medium, which can not be obtained by the ferrite of Ba alone, or by the material which is merely mixed mechanically. In other words, the above-mentioned magnetic powder has high degree of saturated magnetization and the coercive force reduced to the appropriate region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62190802A JPS6435901A (en) | 1987-07-30 | 1987-07-30 | Magnetic powder and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62190802A JPS6435901A (en) | 1987-07-30 | 1987-07-30 | Magnetic powder and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6435901A true JPS6435901A (en) | 1989-02-07 |
Family
ID=16263987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62190802A Pending JPS6435901A (en) | 1987-07-30 | 1987-07-30 | Magnetic powder and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6435901A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013211316A (en) * | 2012-03-30 | 2013-10-10 | Fujifilm Corp | Hexagonal strontium ferrite magnetic powder and production method of the same, and magnetic recording medium and production method of the recording medium |
| JP2023152933A (en) * | 2022-03-30 | 2023-10-17 | Ｄｏｗａエレクトロニクス株式会社 | Magnetic powder for magnetic recording media and its manufacturing method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60178607A (en) * | 1984-02-25 | 1985-09-12 | Ricoh Co Ltd | Metal oxide magnetic materials and magnetic films |
| JPS61278104A (en) * | 1985-06-03 | 1986-12-09 | Sony Corp | Manufacture of hexagonal system ferrite particle powder |
| JPS6255904A (en) * | 1985-09-05 | 1987-03-11 | Sony Corp | Hexagonal system ferrite magnetic powder |
| JPS62123024A (en) * | 1985-11-21 | 1987-06-04 | Nippon Zeon Co Ltd | Magnetic powder for magnetic recording |
| JPS62123023A (en) * | 1985-11-21 | 1987-06-04 | Nippon Zeon Co Ltd | Coated film type magnetic powder for magnetic recording |
| JPS62202822A (en) * | 1986-02-28 | 1987-09-07 | Toshiba Corp | Magnetic powder for high-density magnetic recording |
| JPS62216920A (en) * | 1986-03-14 | 1987-09-24 | Dowa Mining Co Ltd | Magnetoplumbite type ferrite powder and its production |
| JPS6340302A (en) * | 1987-07-18 | 1988-02-20 | Toshiba Corp | Magnetic powder for high-density magnetic recording |
| JPS63107818A (en) * | 1986-05-02 | 1988-05-12 | Hitachi Metals Ltd | Fine hexagonal ferrite particle and production thereof |
| JPS63166726A (en) * | 1986-12-27 | 1988-07-09 | Dowa Mining Co Ltd | Hexagonal ferrite magnetic material for magnetic record |
-
1987
- 1987-07-30 JP JP62190802A patent/JPS6435901A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60178607A (en) * | 1984-02-25 | 1985-09-12 | Ricoh Co Ltd | Metal oxide magnetic materials and magnetic films |
| JPS61278104A (en) * | 1985-06-03 | 1986-12-09 | Sony Corp | Manufacture of hexagonal system ferrite particle powder |
| JPS6255904A (en) * | 1985-09-05 | 1987-03-11 | Sony Corp | Hexagonal system ferrite magnetic powder |
| JPS62123024A (en) * | 1985-11-21 | 1987-06-04 | Nippon Zeon Co Ltd | Magnetic powder for magnetic recording |
| JPS62123023A (en) * | 1985-11-21 | 1987-06-04 | Nippon Zeon Co Ltd | Coated film type magnetic powder for magnetic recording |
| JPS62202822A (en) * | 1986-02-28 | 1987-09-07 | Toshiba Corp | Magnetic powder for high-density magnetic recording |
| JPS62216920A (en) * | 1986-03-14 | 1987-09-24 | Dowa Mining Co Ltd | Magnetoplumbite type ferrite powder and its production |
| JPS63107818A (en) * | 1986-05-02 | 1988-05-12 | Hitachi Metals Ltd | Fine hexagonal ferrite particle and production thereof |
| JPS63166726A (en) * | 1986-12-27 | 1988-07-09 | Dowa Mining Co Ltd | Hexagonal ferrite magnetic material for magnetic record |
| JPS6340302A (en) * | 1987-07-18 | 1988-02-20 | Toshiba Corp | Magnetic powder for high-density magnetic recording |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013211316A (en) * | 2012-03-30 | 2013-10-10 | Fujifilm Corp | Hexagonal strontium ferrite magnetic powder and production method of the same, and magnetic recording medium and production method of the recording medium |
| US9478331B2 (en) | 2012-03-30 | 2016-10-25 | Fujifilm Corporation | Hexagonal strontium ferrite magnetic powder and method of manufacturing the same, and magnetic recording medium and method of manufacturing the same |
| JP2023152933A (en) * | 2022-03-30 | 2023-10-17 | Ｄｏｗａエレクトロニクス株式会社 | Magnetic powder for magnetic recording media and its manufacturing method |
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