JPS5623201A - Production of needle crystal fe-zn alloy magnetic particle powder - Google Patents

Production of needle crystal fe-zn alloy magnetic particle powder

Info

Publication number
JPS5623201A
JPS5623201A JP9788879A JP9788879A JPS5623201A JP S5623201 A JPS5623201 A JP S5623201A JP 9788879 A JP9788879 A JP 9788879A JP 9788879 A JP9788879 A JP 9788879A JP S5623201 A JPS5623201 A JP S5623201A
Authority
JP
Japan
Prior art keywords
needle crystal
gas
contg
particle powder
alloy
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
JP9788879A
Other languages
Japanese (ja)
Other versions
JPS5921364B2 (en
Inventor
Nanao Horiishi
Atsushi Takedoi
Akira Mukozaka
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.)
Toda Kogyo Corp
Original Assignee
Toda Kogyo 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 Toda Kogyo Corp filed Critical Toda Kogyo Corp
Priority to JP54097888A priority Critical patent/JPS5921364B2/en
Publication of JPS5623201A publication Critical patent/JPS5623201A/en
Publication of JPS5921364B2 publication Critical patent/JPS5921364B2/en
Expired legal-status Critical Current

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  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To produce magnetic powder of needle crystal Fe-Zn alloy of superior magnetic characteristics by oxidizing an aqueous mixed soln. of Fe(OH)2 and Zn(OH)2 by O2 gas to allow Zn-contg. needle crystal goethite particles to form and subjecting the same to calcine and reduction treatment after filtering.
CONSTITUTION: An aqueous finely and uniformly mixed soln. of Fe(OH)2 and Zn(OH)2 of 0.1W2.3atom% of Zn(OH)2 with respect to Fe in Zn equiv. and ≥11 in pH is oxidized by an O2-contg. gas to allow Zn-contg. needle crystal goethite particles to form. After these are separated by filtering and are rinsed followed by drying, they are dehydrated under heating and are further calcined by being heated in an atmosphere comprising heating steam and nonreducing gas of 30W100% in steam partial pressure to 350W700°C. Since this yields the needle crystal hematite particles of 0.1W2.0μm mean long axial length and 10W30m2/g specific surface area by a BET method, these are reduced at 350W600°C in a reducing gas, whereby the Fe-Zn alloy magnetic particle powder of superior saturated magnetic flux density and coercive force is produced.
COPYRIGHT: (C)1981,JPO&Japio
JP54097888A 1979-07-30 1979-07-30 Method for producing acicular Fe-Zn alloy magnetic particle powder Expired JPS5921364B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54097888A JPS5921364B2 (en) 1979-07-30 1979-07-30 Method for producing acicular Fe-Zn alloy magnetic particle powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54097888A JPS5921364B2 (en) 1979-07-30 1979-07-30 Method for producing acicular Fe-Zn alloy magnetic particle powder

Publications (2)

Publication Number Publication Date
JPS5623201A true JPS5623201A (en) 1981-03-05
JPS5921364B2 JPS5921364B2 (en) 1984-05-19

Family

ID=14204281

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54097888A Expired JPS5921364B2 (en) 1979-07-30 1979-07-30 Method for producing acicular Fe-Zn alloy magnetic particle powder

Country Status (1)

Country Link
JP (1) JPS5921364B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56166312A (en) * 1980-05-27 1981-12-21 Hitachi Maxell Ltd Manufacture of metallic magnetic powder
US4844977A (en) * 1983-05-10 1989-07-04 Konishiroku Photo Industry Co., Ltd. Magnetic recording medium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6414870U (en) * 1987-07-20 1989-01-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56166312A (en) * 1980-05-27 1981-12-21 Hitachi Maxell Ltd Manufacture of metallic magnetic powder
US4844977A (en) * 1983-05-10 1989-07-04 Konishiroku Photo Industry Co., Ltd. Magnetic recording medium

Also Published As

Publication number Publication date
JPS5921364B2 (en) 1984-05-19

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