JPS54130499A - Production of needle-like goethite - Google Patents

Production of needle-like goethite

Info

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
Application number
JP3786178A
Other languages
Japanese (ja)
Other versions
JPS556578B2 (en
Inventor
Toshihiro Hamahata
Shinji Umeki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP3786178A priority Critical patent/JPS54130499A/en
Publication of JPS54130499A publication Critical patent/JPS54130499A/en
Publication of JPS556578B2 publication Critical patent/JPS556578B2/ja
Granted legal-status Critical Current

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
JP3786178A 1978-03-31 1978-03-31 Production of needle-like goethite Granted JPS54130499A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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