JPS64707A - Manufacture of barium ferrite powder - Google Patents
Manufacture of barium ferrite powderInfo
- Publication number
- JPS64707A JPS64707A JP62163601A JP16360187A JPS64707A JP S64707 A JPS64707 A JP S64707A JP 62163601 A JP62163601 A JP 62163601A JP 16360187 A JP16360187 A JP 16360187A JP S64707 A JPS64707 A JP S64707A
- Authority
- JP
- Japan
- Prior art keywords
- barium ferrite
- aqueous solution
- hydroxide
- ferrite powder
- 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
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To manufacture barium ferrite powder having small particle size and excellent particle size distribution efficiently by wet-reacting an aqueous solution including Fe3+ and Ba2+ or suspension containing a hydroxide thereof at normal pressure in high concentration alkali and thermally treating a barium ferrite product acquired in air.
CONSTITUTION: An aqueous solution containing Fe3+ and Ba2+ or suspension including a hydroxide thereof or both aqueous solution and suspension are wet-reacted at normal pressure in alkali concentration of 6W20mol/l, and a barium ferrite product obtained is thermally treated in air. When coercive-force reducing element ions such as Co2+ are added previously to the aqueous solution containing Fe3+ and Ba2+ or suspension including the hydroxide thereof, the coercive force of barium ferrite powder acquired is inhibited. When coercive- force increasing element ions such as Al3+ are added beforehand to the aqueous solution containing Fe3+ and Ba2+ or suspension including the hydroxide thereof, on the contrary, the coercive force of barium ferrite powder obtained is elevated.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-163601A JPH01707A (en) | 1986-09-05 | 1987-06-30 | Method for manufacturing barium ferrite powder |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61-208920 | 1986-09-05 | ||
| JP20892086 | 1986-09-05 | ||
| JP62-59667 | 1987-03-14 | ||
| JP62-163601A JPH01707A (en) | 1986-09-05 | 1987-06-30 | Method for manufacturing barium ferrite powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS64707A true JPS64707A (en) | 1989-01-05 |
| JPH01707A JPH01707A (en) | 1989-01-05 |
Family
ID=
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019131675A1 (en) * | 2017-12-27 | 2019-07-04 | 富士フイルム株式会社 | Particles of magnetoplumbite-type hexagonal ferrite and method for manufacturing same, and radio wave absorber |
| WO2020044706A1 (en) * | 2018-08-28 | 2020-03-05 | 富士フイルム株式会社 | Magnetoplumbite-type hexagonal ferrite powder, production method therefor, and radio wave absorber |
| WO2020044649A1 (en) * | 2018-08-28 | 2020-03-05 | 富士フイルム株式会社 | Method of producing powder of magnetoplumbite-type hexagonal ferrite, and method of producing radio wave absorber |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019131675A1 (en) * | 2017-12-27 | 2019-07-04 | 富士フイルム株式会社 | Particles of magnetoplumbite-type hexagonal ferrite and method for manufacturing same, and radio wave absorber |
| KR20200086706A (en) * | 2017-12-27 | 2020-07-17 | 후지필름 가부시키가이샤 | Magneto-plum bite-shaped hexagonal ferrite particles, manufacturing method thereof, and radio wave absorber |
| JPWO2019131675A1 (en) * | 2017-12-27 | 2020-11-19 | 富士フイルム株式会社 | Magnetoplanbite type hexagonal ferrite particles, their manufacturing method, and radio wave absorber |
| US11721461B2 (en) | 2017-12-27 | 2023-08-08 | Fujifilm Corporation | Particles of magnetoplumbite-type hexagonal ferrite, method for manufacturing the same, and radio wave absorber |
| WO2020044706A1 (en) * | 2018-08-28 | 2020-03-05 | 富士フイルム株式会社 | Magnetoplumbite-type hexagonal ferrite powder, production method therefor, and radio wave absorber |
| WO2020044649A1 (en) * | 2018-08-28 | 2020-03-05 | 富士フイルム株式会社 | Method of producing powder of magnetoplumbite-type hexagonal ferrite, and method of producing radio wave absorber |
| KR20210029815A (en) * | 2018-08-28 | 2021-03-16 | 후지필름 가부시키가이샤 | Magnetoplumbite type hexagonal ferrite powder, manufacturing method thereof, and radio wave absorber |
| KR20210031740A (en) * | 2018-08-28 | 2021-03-22 | 후지필름 가부시키가이샤 | Method for producing magneto plumbite type hexagonal ferrite powder and method for producing radio wave absorber |
| JPWO2020044649A1 (en) * | 2018-08-28 | 2021-04-30 | 富士フイルム株式会社 | Magnetoplanbite type hexagonal ferrite powder manufacturing method and radio wave absorber manufacturing method |
| JPWO2020044706A1 (en) * | 2018-08-28 | 2021-05-13 | 富士フイルム株式会社 | Magnetoplumbite type hexagonal ferrite powder, its manufacturing method, and radio wave absorber |
| EP3846185A4 (en) * | 2018-08-28 | 2021-10-27 | FUJIFILM Corporation | Method of producing powder of magnetoplumbite-type hexagonal ferrite, and method of producing radio wave absorber |
| JP2022022302A (en) * | 2018-08-28 | 2022-02-03 | 富士フイルム株式会社 | Magnetoplumbite type hexagonal ferrite powder, production method thereof, and electromagnetic wave absorber |
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