JPS575803A - Preparation of magnetic metal powder - Google Patents
Preparation of magnetic metal powderInfo
- Publication number
- JPS575803A JPS575803A JP7875080A JP7875080A JPS575803A JP S575803 A JPS575803 A JP S575803A JP 7875080 A JP7875080 A JP 7875080A JP 7875080 A JP7875080 A JP 7875080A JP S575803 A JPS575803 A JP S575803A
- Authority
- JP
- Japan
- Prior art keywords
- hydroxide
- oxy
- powder
- compound
- suspension
- 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
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To provide the powder being facile in particle size adjustment, free from sintering and getting out of shape during the treatment and compact, and having excellent magnetic characteristics, by having a specific compound and a hydroxide contained in the suspension of ferrous hydroxide when forming α-oxy ferric hydroxide in an alkali region.
CONSTITUTION: An oxygen containing gas is introduced into the suspension of ferrous hydroxide having an adjusted pH of at least 11 to form α-oxy ferric hydroxide. One compound of Zn and Al compounds and the hydroxide of an alkaliearth metal (expressed by Me) are contained in the above-mentioned suspension prior to the gas introduction. The particle size of the magnetic powder being mainly the formed α-oxy ferric hydroxide or the metallic iron finally obtained can be adjusted by adjusting the amount of Zn or Al compound. The sintering and getting out of shape in the particles during the heat treatment can be also very effectively inhibited, and the alkaline region reaction results in the retained compactness of the powder.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7875080A JPS575803A (en) | 1980-06-10 | 1980-06-10 | Preparation of magnetic metal powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7875080A JPS575803A (en) | 1980-06-10 | 1980-06-10 | Preparation of magnetic metal powder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS575803A true JPS575803A (en) | 1982-01-12 |
Family
ID=13670564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7875080A Pending JPS575803A (en) | 1980-06-10 | 1980-06-10 | Preparation of magnetic metal powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS575803A (en) |
-
1980
- 1980-06-10 JP JP7875080A patent/JPS575803A/en active Pending
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