JPS559671A - Manufacturing of magnetic powder - Google Patents

Manufacturing of magnetic powder

Info

Publication number
JPS559671A
JPS559671A JP8332078A JP8332078A JPS559671A JP S559671 A JPS559671 A JP S559671A JP 8332078 A JP8332078 A JP 8332078A JP 8332078 A JP8332078 A JP 8332078A JP S559671 A JPS559671 A JP S559671A
Authority
JP
Japan
Prior art keywords
magnetic powder
zinc compound
ammonium chloride
water
organic
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
JP8332078A
Other languages
Japanese (ja)
Inventor
Kunio Wakai
Yoshio Takeuchi
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.)
Maxell Ltd
Original Assignee
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 Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP8332078A priority Critical patent/JPS559671A/en
Publication of JPS559671A publication Critical patent/JPS559671A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

PURPOSE: To manufacture magnetic powder having improved dispersibility and dispersion stability in organic binders, by immersing magnetic powder in an aqueous solution of a zinc compound and ammonium chloride, and washing with water.
CONSTITUTION: 100 parts by weight of magnetic powder is treated with an aqueous solution containing ≥0.5 part, pref. 1W5 parts of a zinc compound such as ZnCl2, ZnO, etc., and a proper amount of ammonium chloride, and washed with water. The zinc compound is adsorbed to the surface of the magnetic particles. The weight ratio of the ammonium chloride to the zinc compound is pref. ≥0.5. Since zinc compounds are easily soluble to water and compatible with organic solvents, the zinc compound adsorbed to the surface of the magnetic powder improves the affinity between the magnetic powder and the organic solvent, thereby improving the dispersibility and the dispersion stability of the magnetic powder in the organic binder.
COPYRIGHT: (C)1980,JPO&Japio
JP8332078A 1978-07-07 1978-07-07 Manufacturing of magnetic powder Pending JPS559671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8332078A JPS559671A (en) 1978-07-07 1978-07-07 Manufacturing of magnetic powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8332078A JPS559671A (en) 1978-07-07 1978-07-07 Manufacturing of magnetic powder

Publications (1)

Publication Number Publication Date
JPS559671A true JPS559671A (en) 1980-01-23

Family

ID=13799126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8332078A Pending JPS559671A (en) 1978-07-07 1978-07-07 Manufacturing of magnetic powder

Country Status (1)

Country Link
JP (1) JPS559671A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819733A (en) * 1981-07-28 1983-02-04 Toshiba Corp Magnetic recording medium and its manufacture
US4781981A (en) * 1986-12-19 1988-11-01 Toda Kogyo Corp. Plate-like magnetoplumbite ferrite particles for magnetic recording and process for producing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819733A (en) * 1981-07-28 1983-02-04 Toshiba Corp Magnetic recording medium and its manufacture
US4781981A (en) * 1986-12-19 1988-11-01 Toda Kogyo Corp. Plate-like magnetoplumbite ferrite particles for magnetic recording and process for producing the same

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