JPS5625909A - Preparation of magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc - Google Patents

Preparation of magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc

Info

Publication number
JPS5625909A
JPS5625909A JP10234179A JP10234179A JPS5625909A JP S5625909 A JPS5625909 A JP S5625909A JP 10234179 A JP10234179 A JP 10234179A JP 10234179 A JP10234179 A JP 10234179A JP S5625909 A JPS5625909 A JP S5625909A
Authority
JP
Japan
Prior art keywords
cobalt
zinc
specific
needle crystal
heating
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
JP10234179A
Other languages
Japanese (ja)
Other versions
JPS5921922B2 (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 JP54102341A priority Critical patent/JPS5921922B2/en
Publication of JPS5625909A publication Critical patent/JPS5625909A/en
Publication of JPS5921922B2 publication Critical patent/JPS5921922B2/en
Expired legal-status Critical Current

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

Abstract

PURPOSE: To obtain the magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc which has superior magnetic and powder charactersitics and is suitable especially for magnetic materials for magnetic recording by using materials consisting of the needle crystal goethite grain containing specific cobalt and zinc, which are produced by the specific procedures, and applying heating and reduction to them under specific conditions.
CONSTITUTION: Water-soluble silicic salt should be previously added to the alkali solution which is to be used to obtain the solution containing Fe(OH)2, Co(OH)2 and Zn(OH)2 in a fixed ratio and indicating pH12 so that silicon occupies 0.1W0.7atom% against the whole metallic atoms (Fe, Co and Zn) and, after reacting the alkali solution mentioned above with ferrous salt and so on, the mixture is oxidized to produce the needle crystal grain containing goethite cobalt and zinc; after heating and dehydrating materials obtained from the produced grains, needle crystal hematite grains with cobalt and zinc, which have a fixed longitudinal axis length and a fixed axial ratio, are produced, burned by heating under a specific steam partial pressure consisting of heating steam and nonreduction gas and a specific temperature and reduced while heating at a specific temperature to obtain the magnetic grain powder consisting of needle crystal alloy of iron, cobalt and zinc with a specific average longitudinal axis length and a specific surface area.
COPYRIGHT: (C)1981,JPO&Japio
JP54102341A 1979-08-10 1979-08-10 Method for producing acicular Fe-Co-Zn alloy magnetic particle powder Expired JPS5921922B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54102341A JPS5921922B2 (en) 1979-08-10 1979-08-10 Method for producing acicular Fe-Co-Zn alloy magnetic particle powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54102341A JPS5921922B2 (en) 1979-08-10 1979-08-10 Method for producing acicular Fe-Co-Zn alloy magnetic particle powder

Publications (2)

Publication Number Publication Date
JPS5625909A true JPS5625909A (en) 1981-03-12
JPS5921922B2 JPS5921922B2 (en) 1984-05-23

Family

ID=14324794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54102341A Expired JPS5921922B2 (en) 1979-08-10 1979-08-10 Method for producing acicular Fe-Co-Zn alloy magnetic particle powder

Country Status (1)

Country Link
JP (1) JPS5921922B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409020A (en) * 1983-01-24 1983-10-11 The United States Of America As Represented By The Secretary Of The Interior Recovery of metals from grinding sludges
JPS596502A (en) * 1982-07-05 1984-01-13 Mitsui Toatsu Chem Inc Manufacture of improved ferromagnetic iron powder
CN100417475C (en) * 2006-03-10 2008-09-10 同济大学 Production of metal zinc powder from zinc dust and zinc dross

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS596502A (en) * 1982-07-05 1984-01-13 Mitsui Toatsu Chem Inc Manufacture of improved ferromagnetic iron powder
JPH0341963B2 (en) * 1982-07-05 1991-06-25
US4409020A (en) * 1983-01-24 1983-10-11 The United States Of America As Represented By The Secretary Of The Interior Recovery of metals from grinding sludges
CN100417475C (en) * 2006-03-10 2008-09-10 同济大学 Production of metal zinc powder from zinc dust and zinc dross

Also Published As

Publication number Publication date
JPS5921922B2 (en) 1984-05-23

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