JPS5588307A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5588307A
JPS5588307A JP16192278A JP16192278A JPS5588307A JP S5588307 A JPS5588307 A JP S5588307A JP 16192278 A JP16192278 A JP 16192278A JP 16192278 A JP16192278 A JP 16192278A JP S5588307 A JPS5588307 A JP S5588307A
Authority
JP
Japan
Prior art keywords
magnetic
binder
expressed
mixing
rare earth
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
JP16192278A
Other languages
Japanese (ja)
Other versions
JPS6033286B2 (en
Inventor
Ryuji Shirahata
Tatsuji Kitamoto
Goro Akashi
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP53161922A priority Critical patent/JPS6033286B2/en
Publication of JPS5588307A publication Critical patent/JPS5588307A/en
Publication of JPS6033286B2 publication Critical patent/JPS6033286B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain a magnetic medium with high magnetic resistance capable of preventing a magnetic signal from being erased by externally disturbing field by mixing a magnetic powder of such composition as is expressed by a specific formula consisting of Y or rare earth element and Fe, Co, etc. in the binder.
CONSTITUTION: A magnetic powder of such composition as is expressed by a general formula RM5 or R2M17 (R being Y or rare earth element, M being Fe, Co, Fe-Co or that of being substituted with Cu partly therefor) is contained in a binder, thereby securing magnetic resistance Hc at about 3,000 Oe or over and a ratio of Hc to Q field value Hq at about 3 or over. For the magnetic powder, for example, SmCo5, YCo5, CeCo5, etc. are preferable. To obtain said characteristics, for example, an ingot of magnetic material is treated thermally at 800W1000°C cooled down quickly, ground to particles at 50Å up to 1μm, and a magnetic coating is prepared by mixing the binder so as to obtain a weight ratio of the magnetic particles to the binder at 20W1.
COPYRIGHT: (C)1980,JPO&Japio
JP53161922A 1978-12-27 1978-12-27 magnetic recording medium Expired JPS6033286B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53161922A JPS6033286B2 (en) 1978-12-27 1978-12-27 magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53161922A JPS6033286B2 (en) 1978-12-27 1978-12-27 magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5588307A true JPS5588307A (en) 1980-07-04
JPS6033286B2 JPS6033286B2 (en) 1985-08-02

Family

ID=15744575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53161922A Expired JPS6033286B2 (en) 1978-12-27 1978-12-27 magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS6033286B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201217A (en) * 1983-04-28 1984-11-14 Tohoku Metal Ind Ltd Magnetic recording medium
EP0137949A2 (en) * 1983-08-19 1985-04-24 Kabushiki Kaisha Toshiba Magnetic recording medium
US5230818A (en) * 1991-12-20 1993-07-27 Eastman Kodak Company Coating compositions for master media for anhysteretic recording

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201217A (en) * 1983-04-28 1984-11-14 Tohoku Metal Ind Ltd Magnetic recording medium
EP0137949A2 (en) * 1983-08-19 1985-04-24 Kabushiki Kaisha Toshiba Magnetic recording medium
US5230818A (en) * 1991-12-20 1993-07-27 Eastman Kodak Company Coating compositions for master media for anhysteretic recording

Also Published As

Publication number Publication date
JPS6033286B2 (en) 1985-08-02

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