JPS5572007A - Magnetic material - Google Patents
Magnetic materialInfo
- Publication number
- JPS5572007A JPS5572007A JP14568178A JP14568178A JPS5572007A JP S5572007 A JPS5572007 A JP S5572007A JP 14568178 A JP14568178 A JP 14568178A JP 14568178 A JP14568178 A JP 14568178A JP S5572007 A JPS5572007 A JP S5572007A
- Authority
- JP
- Japan
- Prior art keywords
- silicic acid
- acid compound
- cobalt
- oxide particulates
- coercive force
- 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
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain an enhanced coercive force and its sharp distribution by depositing a cobalt compound and a silicic acid compound on the surface of an acicular magnetic oxide particulates.
CONSTITUTION: Acicular iron oxide particulates, a cobalt salt, and a silicic acid compound are dispered in an alkali solution, heat-treated, washed with water, dehydrated, and then dried. More preferably, the silicic acid compound is added into a mixture of the acicular iron oxide particulates and cobalt salt which are being dispersed into alkaline solution under heating, and then washed with water, dehydrated, and dried. This allows the cobalt salt and silicate salt to be deposited on the surface of the acicular iron oxide particulates. If the silicic acid compound is not used in the process of heating, a long period of heating causes the deposited cobalt to be partly decomposed by the alkali, resulting in a reduced coercive force. A magnetic material using such silicic acid compound provides a magnetic tape having a more enhanced coercive force with a sharper distribution than those given by a material not using such silicic acid compound.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14568178A JPS5572007A (en) | 1978-11-24 | 1978-11-24 | Magnetic material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14568178A JPS5572007A (en) | 1978-11-24 | 1978-11-24 | Magnetic material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5572007A true JPS5572007A (en) | 1980-05-30 |
Family
ID=15390619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14568178A Pending JPS5572007A (en) | 1978-11-24 | 1978-11-24 | Magnetic material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5572007A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5583209A (en) * | 1978-12-20 | 1980-06-23 | Hitachi Maxell Ltd | Ferromagnetic powder and preparing the same |
JPS5583208A (en) * | 1978-12-20 | 1980-06-23 | Hitachi Maxell Ltd | Preparation of ferromagnetic powder |
JPS5583207A (en) * | 1978-12-20 | 1980-06-23 | Hitachi Maxell Ltd | Preparation of ferromagnetic powder |
JPS5914608A (en) * | 1982-07-16 | 1984-01-25 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
-
1978
- 1978-11-24 JP JP14568178A patent/JPS5572007A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5583209A (en) * | 1978-12-20 | 1980-06-23 | Hitachi Maxell Ltd | Ferromagnetic powder and preparing the same |
JPS5583208A (en) * | 1978-12-20 | 1980-06-23 | Hitachi Maxell Ltd | Preparation of ferromagnetic powder |
JPS5583207A (en) * | 1978-12-20 | 1980-06-23 | Hitachi Maxell Ltd | Preparation of ferromagnetic powder |
JPS6217364B2 (en) * | 1978-12-20 | 1987-04-17 | Hitachi Maxell | |
JPS5914608A (en) * | 1982-07-16 | 1984-01-25 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPH0463525B2 (en) * | 1982-07-16 | 1992-10-12 | Matsushita Electric Ind Co Ltd |
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