JPS54130499A - Production of needle-like goethite - Google Patents
Production of needle-like goethiteInfo
- Publication number
- JPS54130499A JPS54130499A JP3786178A JP3786178A JPS54130499A JP S54130499 A JPS54130499 A JP S54130499A JP 3786178 A JP3786178 A JP 3786178A JP 3786178 A JP3786178 A JP 3786178A JP S54130499 A JPS54130499 A JP S54130499A
- Authority
- JP
- Japan
- Prior art keywords
- goethite
- regulated
- particle size
- needle
- small
- 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.)
- Granted
Links
Landscapes
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To produce needle-like goethite of a small particle size by regulating the ratio of anion such as sulfate ion or the like to ferrous ion in an aq. soln. of ferrous sulfate or the like to below 1 and oxidizing the regulated soln. at a predetermined pH and temp. to considerably shorten the reaction time.
CONSTITUTION: FeSO4.7H2O is adjusted to pH≥11 with a alkali such as NaOH, and the ratio of sulfate ion to ferrous ion is regulated to below 1. The regulated FeSO4.7H2O is then oxidized by blowing air or the like. The resulting needle-like goethite is small in particle size, and γ-Fe2O3 made of the goethite is also small in particle size and exhibits more superior magnetic characteristics than those of a conventional product.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3786178A JPS54130499A (en) | 1978-03-31 | 1978-03-31 | Production of needle-like goethite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3786178A JPS54130499A (en) | 1978-03-31 | 1978-03-31 | Production of needle-like goethite |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54130499A true JPS54130499A (en) | 1979-10-09 |
JPS556578B2 JPS556578B2 (en) | 1980-02-18 |
Family
ID=12509318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3786178A Granted JPS54130499A (en) | 1978-03-31 | 1978-03-31 | Production of needle-like goethite |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54130499A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5648845U (en) * | 1979-09-20 | 1981-04-30 | ||
JPS5654318A (en) * | 1979-10-09 | 1981-05-14 | Omron Tateisi Electronics Co | Detector for color tone |
US4597958A (en) * | 1984-09-17 | 1986-07-01 | Mitsui Mining & Smelting Co., Ltd. | Method of producing hydrated iron oxide |
-
1978
- 1978-03-31 JP JP3786178A patent/JPS54130499A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5648845U (en) * | 1979-09-20 | 1981-04-30 | ||
JPS6041155Y2 (en) * | 1979-09-20 | 1985-12-13 | 日本発条株式会社 | Chair with angle adjustment mechanism |
JPS5654318A (en) * | 1979-10-09 | 1981-05-14 | Omron Tateisi Electronics Co | Detector for color tone |
JPH0140305B2 (en) * | 1979-10-09 | 1989-08-28 | Omron Tateisi Electronics Co | |
US4597958A (en) * | 1984-09-17 | 1986-07-01 | Mitsui Mining & Smelting Co., Ltd. | Method of producing hydrated iron oxide |
Also Published As
Publication number | Publication date |
---|---|
JPS556578B2 (en) | 1980-02-18 |
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