JPS55127003A - Manufacturing of magnetic powder with high coercive force - Google Patents

Manufacturing of magnetic powder with high coercive force

Info

Publication number
JPS55127003A
JPS55127003A JP3429579A JP3429579A JPS55127003A JP S55127003 A JPS55127003 A JP S55127003A JP 3429579 A JP3429579 A JP 3429579A JP 3429579 A JP3429579 A JP 3429579A JP S55127003 A JPS55127003 A JP S55127003A
Authority
JP
Japan
Prior art keywords
powder
coercive force
high coercive
magnetic
magnetic powder
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
JP3429579A
Other languages
Japanese (ja)
Inventor
Shinji Umeki
Kazuo Takada
Kazuaki Konuki
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP3429579A priority Critical patent/JPS55127003A/en
Publication of JPS55127003A publication Critical patent/JPS55127003A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain magnetic powder with high coercive force superior in stability and suitable for a magnetic recording medium by using the mixed powder of γ- Fe2O3 and Fe3O4 as iron oxide powder when composing magnetic powder with high coercive force.
CONSTITUTION: When magnetic powder with high coercive force and superior magnetic stability is composed by forming a compound including Co as main ingredient on a surface layer of ferromagnetic iron oxide powder, the mixture of γ-Fe2O3 powder and a small amount of Fe3O4 powder is used as starting material. In such a manner, two kinds of ferromagnetic oxides are used in combination, so that it becomes possible to obtain magnetic powder with high coercive force, which is superior in stability against thermal change and durability against the repeated use, and suitable for a magnetic recording medium as a result of the above combination effect.
COPYRIGHT: (C)1980,JPO&Japio
JP3429579A 1979-03-26 1979-03-26 Manufacturing of magnetic powder with high coercive force Pending JPS55127003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3429579A JPS55127003A (en) 1979-03-26 1979-03-26 Manufacturing of magnetic powder with high coercive force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3429579A JPS55127003A (en) 1979-03-26 1979-03-26 Manufacturing of magnetic powder with high coercive force

Publications (1)

Publication Number Publication Date
JPS55127003A true JPS55127003A (en) 1980-10-01

Family

ID=12410159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3429579A Pending JPS55127003A (en) 1979-03-26 1979-03-26 Manufacturing of magnetic powder with high coercive force

Country Status (1)

Country Link
JP (1) JPS55127003A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170028A (en) * 1984-02-14 1985-09-03 Tdk Corp Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170028A (en) * 1984-02-14 1985-09-03 Tdk Corp Magnetic recording medium

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