JPS6452002A - Acicular magnetized metal fine powder having excellent dispersion and its production - Google Patents
Acicular magnetized metal fine powder having excellent dispersion and its productionInfo
- Publication number
- JPS6452002A JPS6452002A JP62209490A JP20949087A JPS6452002A JP S6452002 A JPS6452002 A JP S6452002A JP 62209490 A JP62209490 A JP 62209490A JP 20949087 A JP20949087 A JP 20949087A JP S6452002 A JPS6452002 A JP S6452002A
- Authority
- JP
- Japan
- Prior art keywords
- acicular
- water
- al2o3
- sio2
- oxide
- 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
- 239000002184 metal Substances 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 title abstract 2
- 239000006185 dispersion Substances 0.000 title 1
- 239000000843 powder Substances 0.000 title 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 229910052681 coesite Inorganic materials 0.000 abstract 3
- 229910052593 corundum Inorganic materials 0.000 abstract 3
- 229910052906 cristobalite Inorganic materials 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 3
- 239000000377 silicon dioxide Substances 0.000 abstract 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract 3
- 229910052682 stishovite Inorganic materials 0.000 abstract 3
- 229910052905 tridymite Inorganic materials 0.000 abstract 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 2
- CUPCBVUMRUSXIU-UHFFFAOYSA-N [Fe].OOO Chemical compound [Fe].OOO CUPCBVUMRUSXIU-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 239000007789 gas Substances 0.000 abstract 2
- 229910021519 iron(III) oxide-hydroxide Inorganic materials 0.000 abstract 2
- 238000001035 drying Methods 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 239000002923 metal particle Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
Landscapes
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE:To produce acicular magnetized metal fine particle having excellent magnetic characteristic by coating acicular iron oxyhydroxide with compound of Ni, etc., in water, further if necessary, with SiO2, Al2O3, etc., containing heating and burning after filtrating and drying and reducing by reducing gas of H2, etc. CONSTITUTION:The acicular iron oxyhydroxide, iron oxide or ferrite composing of Fe as main component are coated with metallic oxides of Fe and Ni, etc. in the water and further, if necessary, with oxide of SiO2, Al2O3, etc., which is difficult to reduce by hydrogen in the water. After filtrating this, it is dried and heated and burnt under non-reducing gas atmosphere and then, heated and reduced under hydrogen gas atmosphere. The oxide of Ni, etc., is reduced to diffuse in the acicular metal particle composing Fe as the main component, and the SiO2 and Al2O3 are not reduced and applied as these compounds are. This is put under the atmosphere at 10-60 deg.C and 40-100% relative humidity to absorb 0.8-2% of water and the acicular magnetized method particle is produced as coating type magnetic recording medium for magnetic tape or magnetic disk having excellent magnetic characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209490A JPS6452002A (en) | 1987-08-24 | 1987-08-24 | Acicular magnetized metal fine powder having excellent dispersion and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209490A JPS6452002A (en) | 1987-08-24 | 1987-08-24 | Acicular magnetized metal fine powder having excellent dispersion and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6452002A true JPS6452002A (en) | 1989-02-28 |
Family
ID=16573678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62209490A Pending JPS6452002A (en) | 1987-08-24 | 1987-08-24 | Acicular magnetized metal fine powder having excellent dispersion and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6452002A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005340672A (en) * | 2004-05-28 | 2005-12-08 | Asahi Techno Glass Corp | Magnetic powder for magnetic recording medium, and manufacturing method thereof |
| JP2008084900A (en) * | 2006-09-26 | 2008-04-10 | Dowa Holdings Co Ltd | Magnetic powder for coating type magnetic recording medium, its production process and magnetic recording medium |
| JP2012080116A (en) * | 2011-11-30 | 2012-04-19 | Dowa Holdings Co Ltd | Magnetic powder for coating type magnetic recording medium, production method for the same and magnetic recording medium |
-
1987
- 1987-08-24 JP JP62209490A patent/JPS6452002A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005340672A (en) * | 2004-05-28 | 2005-12-08 | Asahi Techno Glass Corp | Magnetic powder for magnetic recording medium, and manufacturing method thereof |
| JP2008084900A (en) * | 2006-09-26 | 2008-04-10 | Dowa Holdings Co Ltd | Magnetic powder for coating type magnetic recording medium, its production process and magnetic recording medium |
| JP2012080116A (en) * | 2011-11-30 | 2012-04-19 | Dowa Holdings Co Ltd | Magnetic powder for coating type magnetic recording medium, production method for the same and magnetic recording medium |
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