JPS5673633A - Manufacture of needlelike goethite - Google Patents

Manufacture of needlelike goethite

Info

Publication number
JPS5673633A
JPS5673633A JP14714579A JP14714579A JPS5673633A JP S5673633 A JPS5673633 A JP S5673633A JP 14714579 A JP14714579 A JP 14714579A JP 14714579 A JP14714579 A JP 14714579A JP S5673633 A JPS5673633 A JP S5673633A
Authority
JP
Japan
Prior art keywords
ferrous
manufacture
needlelike
goethite
anions
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
Application number
JP14714579A
Other languages
Japanese (ja)
Inventor
Toshihiro Hamahata
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 JP14714579A priority Critical patent/JPS5673633A/en
Publication of JPS5673633A publication Critical patent/JPS5673633A/en
Pending legal-status Critical Current

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  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To obtain homogeneous needlelike goethite by adding alkali to a ferrous salt soln., adjusting the ratio of anions to ferrous ions to ≤1, and carrying out oxidation with sodium chlorate or potassium chlorate.
CONSTITUTION: Alkali is added to a ferrous salt soln. such as a ferrous sulfate soln. to precipitate ferrous hydroxide at ≥11pH, and the ratio of anions to ferrous ions is adjusted to ≤1. At this time, the setting time of ferrous hydroxide is controlled to 2W16hr. Sodium chlorate or potassium chlorate is then added to manufacture needlelike goethite by oxidation at ≤80°C.
COPYRIGHT: (C)1981,JPO&Japio
JP14714579A 1979-11-15 1979-11-15 Manufacture of needlelike goethite Pending JPS5673633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14714579A JPS5673633A (en) 1979-11-15 1979-11-15 Manufacture of needlelike goethite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14714579A JPS5673633A (en) 1979-11-15 1979-11-15 Manufacture of needlelike goethite

Publications (1)

Publication Number Publication Date
JPS5673633A true JPS5673633A (en) 1981-06-18

Family

ID=15423593

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14714579A Pending JPS5673633A (en) 1979-11-15 1979-11-15 Manufacture of needlelike goethite

Country Status (1)

Country Link
JP (1) JPS5673633A (en)

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