JPS5565405A - Ferromagnetic metal powder for magnetic recording medium - Google Patents

Ferromagnetic metal powder for magnetic recording medium

Info

Publication number
JPS5565405A
JPS5565405A JP13889178A JP13889178A JPS5565405A JP S5565405 A JPS5565405 A JP S5565405A JP 13889178 A JP13889178 A JP 13889178A JP 13889178 A JP13889178 A JP 13889178A JP S5565405 A JPS5565405 A JP S5565405A
Authority
JP
Japan
Prior art keywords
metal powder
recording medium
magnetic recording
ferromagnetic metal
saturation magnetization
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
JP13889178A
Other languages
Japanese (ja)
Inventor
Yasutaro Kamisaka
Seiichi Asada
Sadakuni Nagaike
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.)
Hitachi Ltd
Maxell Holdings Ltd
Original Assignee
Hitachi Ltd
Hitachi Maxell 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 Hitachi Ltd, Hitachi Maxell Ltd filed Critical Hitachi Ltd
Priority to JP13889178A priority Critical patent/JPS5565405A/en
Publication of JPS5565405A publication Critical patent/JPS5565405A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To obtain corrosion-resisting magnetic metal powder that has a larger magnetic property by oxidizing the surface of metal powder composed of principally Fe; and limiting the saturation magnetization to a particular range.
CONSTITUTION: After dehydration treatment is given to needle-shaped α-Fe2O3 containing a small amount of one or more kinds of Cr, Co, Ni, P, etc., it is reduced by hydrogen in a H2 gas current. If the Fe metal powder is soaked in, for instance, ethyl alcohol, and the surface of the metal powder is oxidized while sending the air into the alcohol, before being dried completely, the powder of which the saturation magnetization is limited to a range from 70W100emu/g can be obtained. On doing this, superior corrosion-resisting magnetic metal powder composed of mainly Fe that has a larger magnetic property is obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP13889178A 1978-11-13 1978-11-13 Ferromagnetic metal powder for magnetic recording medium Pending JPS5565405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13889178A JPS5565405A (en) 1978-11-13 1978-11-13 Ferromagnetic metal powder for magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13889178A JPS5565405A (en) 1978-11-13 1978-11-13 Ferromagnetic metal powder for magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5565405A true JPS5565405A (en) 1980-05-16

Family

ID=15232525

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13889178A Pending JPS5565405A (en) 1978-11-13 1978-11-13 Ferromagnetic metal powder for magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5565405A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143735A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPS57143734A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPS58119609A (en) * 1982-01-11 1983-07-16 Fuji Photo Film Co Ltd Magnetic recording medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143735A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPS57143734A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPH0353689B2 (en) * 1981-02-27 1991-08-15 Hitachi Maxell
JPS58119609A (en) * 1982-01-11 1983-07-16 Fuji Photo Film Co Ltd Magnetic recording medium
JPH0412009B2 (en) * 1982-01-11 1992-03-03 Fuji Photo Film Co Ltd

Similar Documents

Publication Publication Date Title
JPS5415126A (en) Dc to dc converter
JPS5629A (en) Vacuum-evaporated film type magnetic recording substance and its manufacture
JPS5565405A (en) Ferromagnetic metal powder for magnetic recording medium
JPS5687218A (en) Vertical magnetization type magnetic head
JPS5659629A (en) Manufacture of high coercive force magnetic powder
JPS56203A (en) Manufacture of alloy magnetic powder composed primarily of metallic iron or iron
JPS5583209A (en) Ferromagnetic powder and preparing the same
JPS5472715A (en) High permeability amorphous alloy
JPS53115696A (en) Method for producing iron oxide powder
JPS5341202A (en) Novel magnetic recording medium
JPS5576041A (en) Amorphous alloy
JPS5423022A (en) Amorphous alloy
JPS5218302A (en) Magnetic sheet recording/playing method
JPS5241893A (en) Magnetic recording medium
JPS53115697A (en) Method for producing ferromagnetic iron oxide powder
JPS55107758A (en) Fe-co type magnetic material
JPS55167139A (en) Manufacture of oxide magnetic thin film
JPS5275700A (en) Production of magnetic iron oxide powder including co
JPS55107760A (en) Fe-co type magnetic material
JPS5212498A (en) Magnetic alloy
JPS51149596A (en) Magnetic recording medium and its prepreparation method
JPS5635705A (en) Production of magnetic alloy powder
JPS5361306A (en) Magnetic recording medium
JPS5763606A (en) Manufacture of magnetic powder
JPS5532236A (en) Magnetic head