JPS55129935A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS55129935A
JPS55129935A JP3581679A JP3581679A JPS55129935A JP S55129935 A JPS55129935 A JP S55129935A JP 3581679 A JP3581679 A JP 3581679A JP 3581679 A JP3581679 A JP 3581679A JP S55129935 A JPS55129935 A JP S55129935A
Authority
JP
Japan
Prior art keywords
powder
recording medium
magnetic
magnetic recording
granular
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
JP3581679A
Other languages
Japanese (ja)
Other versions
JPS5845088B2 (en
Inventor
Takeshi Matsuura
Seiji Wataya
Akira Morioka
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 JP54035816A priority Critical patent/JPS5845088B2/en
Publication of JPS55129935A publication Critical patent/JPS55129935A/en
Publication of JPS5845088B2 publication Critical patent/JPS5845088B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain a magnetic recording medium which is superior in resistance to wear and weras a magnetic head little, by mixing nonmagnetic powder of a Mohs hardness of 9 or more and granular α iron oxide powder to form a magnetic layer.
CONSTITUTION: Granular α iron oxide powder and nonmagnetic powder (for example, Cr2O3 powder and Al2O3 powder) of a Mohs hardness of 9 or more are mixed in the proportions of approximately weight ratio 1:0.2W1 and are used as a reinforcement additive, and the reinforcement additive above of 0.5W10wt% is mixed for magnetic powder to form a magnetic layer.
COPYRIGHT: (C)1980,JPO&Japio
JP54035816A 1979-03-26 1979-03-26 magnetic recording medium Expired JPS5845088B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54035816A JPS5845088B2 (en) 1979-03-26 1979-03-26 magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54035816A JPS5845088B2 (en) 1979-03-26 1979-03-26 magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS55129935A true JPS55129935A (en) 1980-10-08
JPS5845088B2 JPS5845088B2 (en) 1983-10-07

Family

ID=12452452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54035816A Expired JPS5845088B2 (en) 1979-03-26 1979-03-26 magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5845088B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179945A (en) * 1981-04-28 1982-11-05 Fuji Photo Film Co Ltd Magnetic recording medium
JPS59144036A (en) * 1983-02-07 1984-08-17 Hitachi Maxell Ltd Magnetic recording medium
US5030332A (en) * 1990-04-19 1991-07-09 Massachusetts Institute Of Technology Method for making magnetic oxide precipitates

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0563882U (en) * 1992-02-07 1993-08-24 ユニタック株式会社 Spelling tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179945A (en) * 1981-04-28 1982-11-05 Fuji Photo Film Co Ltd Magnetic recording medium
JPS59144036A (en) * 1983-02-07 1984-08-17 Hitachi Maxell Ltd Magnetic recording medium
US5030332A (en) * 1990-04-19 1991-07-09 Massachusetts Institute Of Technology Method for making magnetic oxide precipitates

Also Published As

Publication number Publication date
JPS5845088B2 (en) 1983-10-07

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