KR850005124A - 소결방지제-함유탄화철 침상입자물질 - Google Patents
소결방지제-함유탄화철 침상입자물질 Download PDFInfo
- Publication number
- KR850005124A KR850005124A KR1019840006565A KR840006565A KR850005124A KR 850005124 A KR850005124 A KR 850005124A KR 1019840006565 A KR1019840006565 A KR 1019840006565A KR 840006565 A KR840006565 A KR 840006565A KR 850005124 A KR850005124 A KR 850005124A
- Authority
- KR
- South Korea
- Prior art keywords
- sintering agent
- iron carbide
- needle
- containing iron
- acicular particles
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
- Hard Magnetic Materials (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Compounds Of Iron (AREA)
- Powder Metallurgy (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
Claims (5)
- 소결방지제를 포함하는 탄화철로 이루어지는 것을 특징으로 하는 침상입자.
- 제1항에 있어서, 평균축비가 적어도 3인 것을 특징으로 하는 침상입자.
- 제1항에 있어서, 탄화철 함량이 적어도 20중량%인 것을 특징으로 하는 침상입자.
- 침상 옥시수산화철을 소결방지제로 피복하는 단계와 탈수후 또는 탈수하지 않고 피복된 옥시수산화철을 CO 또는 CO의 H2와의 혼합물과 접촉시키는 단계로 이루어지는 것을 특징으로 하는 소결방지제를 포함하는 탄화철 함유 침상입자의 제조방법.
- 소결방지제를 포함하는 탄화철 함유 침상입자로 이루어지는 자기물질.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58-250163 | 1983-12-28 | ||
| JP???58-250163 | 1983-12-28 | ||
| JP58250163A JPS60141611A (ja) | 1983-12-28 | 1983-12-28 | 炭化鉄を含有する針状粒子及びその製法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR850005124A true KR850005124A (ko) | 1985-08-21 |
| KR890002665B1 KR890002665B1 (ko) | 1989-07-22 |
Family
ID=17203756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019840006565A KR890002665B1 (ko) | 1983-12-28 | 1984-11-02 | 소결 방지제-함유 탄화철 침상입자물질 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS60141611A (ko) |
| KR (1) | KR890002665B1 (ko) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6161404A (ja) * | 1984-08-31 | 1986-03-29 | Sony Corp | 金属磁性粉末の製造方法 |
| JPS61154110A (ja) * | 1984-12-27 | 1986-07-12 | Mitsui Toatsu Chem Inc | 磁気記録用針状性炭化鉄微粒子及びその製造方法 |
| JPH0729763B2 (ja) * | 1987-10-13 | 1995-04-05 | ダイキン工業株式会社 | 炭化鉄微粒子及びその製造法 |
| JPH0729764B2 (ja) * | 1987-10-14 | 1995-04-05 | ダイキン工業株式会社 | 炭化鉄微粒子、磁性材料及び該微粒子の製造法 |
| JPH0729765B2 (ja) * | 1988-01-27 | 1995-04-05 | ダイキン工業株式会社 | 炭化鉄微粒子及びその製造方法 |
| US5026605A (en) * | 1988-04-28 | 1991-06-25 | Daikin Industries Ltd. | Coated iron carbide fine particles |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572993A (en) * | 1968-07-23 | 1971-03-30 | Du Pont | Ultrafine,nonpyrophoric,chi-iron carbide having high coercivity |
| JPS56145121A (en) * | 1980-03-20 | 1981-11-11 | Hitachi Maxell Ltd | Magnetic powder of metal-containing iron oxide and its preparation |
| JPS5943420B2 (ja) * | 1981-04-27 | 1984-10-22 | 科学技術庁無機材質研究所長 | ＹｂＦｅＭｇＯ↓４で示される六方晶系の層状構造を有する化合物およびその製造法 |
-
1983
- 1983-12-28 JP JP58250163A patent/JPS60141611A/ja active Granted
-
1984
- 1984-11-02 KR KR1019840006565A patent/KR890002665B1/ko not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR890002665B1 (ko) | 1989-07-22 |
| JPH0121089B2 (ko) | 1989-04-19 |
| JPS60141611A (ja) | 1985-07-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| G160 | Decision to publish patent application | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 19960716 Year of fee payment: 8 |
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| LAPS | Lapse due to unpaid annual fee |