JPS6479017A - Production of plate-shaped magnetic powder - Google Patents

Production of plate-shaped magnetic powder

Info

Publication number
JPS6479017A
JPS6479017A JP62236510A JP23651087A JPS6479017A JP S6479017 A JPS6479017 A JP S6479017A JP 62236510 A JP62236510 A JP 62236510A JP 23651087 A JP23651087 A JP 23651087A JP S6479017 A JPS6479017 A JP S6479017A
Authority
JP
Japan
Prior art keywords
ion
powder
plate
crystal structure
shaped magnetic
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
JP62236510A
Other languages
Japanese (ja)
Inventor
Koichi Ikemoto
Hideo Torii
Masaki Aoki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62236510A priority Critical patent/JPS6479017A/en
Priority to KR1019880005319A priority patent/KR920004999B1/en
Publication of JPS6479017A publication Critical patent/JPS6479017A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To produce uniform plate-shaped magnetic powder having minute particle diameter at a low cost and in mass production, by uniformly mixing coprecipitated superfine powder with carbon powder and thereafter, by calcining in non-oxidative atmosphere. CONSTITUTION:The plate-shaped magnetic powder for magnetic recording, having magnetoplumbite type crystal structure and spinel type crystal structure in the same particle in coexistence, and having the axis able to be easily magnetized in the perpendicular direction to the plate surface, is produced as follows: the coprecipitated superfine powder obtd. from the aq. soln. contg. one or more kinds of two valent ion forming hexagonal crystalline ferrite of magnetoplumbite type crystal structure such as Ba<2+> ion, Sr<2+> ion, Pb<2+> ion, and iron ion in 12 times the amt. of the two valent ion, expressed in terms of mol. ratio, and further, trace amt. of other added metal ion, is uniformly mixed with carbon powder and then, calcined in the non-oxidative atmosphere.
JP62236510A 1987-05-07 1987-09-21 Production of plate-shaped magnetic powder Pending JPS6479017A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62236510A JPS6479017A (en) 1987-09-21 1987-09-21 Production of plate-shaped magnetic powder
KR1019880005319A KR920004999B1 (en) 1987-05-07 1988-05-07 Ferrous type magnetic body and its manufacturing method and magnatic medium using it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62236510A JPS6479017A (en) 1987-09-21 1987-09-21 Production of plate-shaped magnetic powder

Publications (1)

Publication Number Publication Date
JPS6479017A true JPS6479017A (en) 1989-03-24

Family

ID=17001779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62236510A Pending JPS6479017A (en) 1987-05-07 1987-09-21 Production of plate-shaped magnetic powder

Country Status (1)

Country Link
JP (1) JPS6479017A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6918906B2 (en) 2001-03-30 2005-07-19 Gary L. Long Endoscopic ablation system with improved electrode geometry

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6918906B2 (en) 2001-03-30 2005-07-19 Gary L. Long Endoscopic ablation system with improved electrode geometry

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