JPS5525854A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5525854A
JPS5525854A JP9849878A JP9849878A JPS5525854A JP S5525854 A JPS5525854 A JP S5525854A JP 9849878 A JP9849878 A JP 9849878A JP 9849878 A JP9849878 A JP 9849878A JP S5525854 A JPS5525854 A JP S5525854A
Authority
JP
Japan
Prior art keywords
iron oxide
powder
magnetic
oxide powder
weight
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
JP9849878A
Other languages
Japanese (ja)
Inventor
Haruo Ando
Susumu Kitaoka
Toshinobu Sueyoshi
Hikari Ishida
Akira Kato
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 Holdings 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 JP9849878A priority Critical patent/JPS5525854A/en
Publication of JPS5525854A publication Critical patent/JPS5525854A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain the excellent electromagnetic conversion property as well as to reduce the electrification property by using together both the iron oxide magnetic powder containing Co and the magnetic iron oxide powder containing the bivalent ion.
CONSTITUTION: The γ-Fe203 powder is diffused into the aqueous solution containing Co salt and its equivalent alkali and the treated at the temperature lower than the boilding point of the dispersion solution. Thus the Co-containing iron oxide layer is formed on the iron oxide powder. Then the mixture magnetic powder composed of 70W97 parts by weight of the Co-containing iron oxide powder and 3W30 parts by weight of the magnetic iron oxide powder which contains over 0.05 of the bivalent Fe in the powder particle and in the form of Fe2+/Fe3+ and features a low intrinsic electric resistance is coated on the substrate along with the bonding agent.
COPYRIGHT: (C)1980,JPO&Japio
JP9849878A 1978-08-11 1978-08-11 Magnetic recording medium Pending JPS5525854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9849878A JPS5525854A (en) 1978-08-11 1978-08-11 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9849878A JPS5525854A (en) 1978-08-11 1978-08-11 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5525854A true JPS5525854A (en) 1980-02-23

Family

ID=14221297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9849878A Pending JPS5525854A (en) 1978-08-11 1978-08-11 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5525854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57110256A (en) * 1980-12-28 1982-07-09 Terumo Corp Porous hollow yarn type artificial lung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57110256A (en) * 1980-12-28 1982-07-09 Terumo Corp Porous hollow yarn type artificial lung
JPS6317465B2 (en) * 1980-12-28 1988-04-13 Terumo Corp

Similar Documents

Publication Publication Date Title
JPS525498A (en) Ferromagnetic grit manufacturing process
JPS5792423A (en) Magnetic recording medium
JPS5525854A (en) Magnetic recording medium
JPS5570936A (en) Magnetic recording media
JPS5413997A (en) Magnetic recording medium and its manufacture
JPS54122103A (en) Magnetic recording medium and production of the same
JPS5279294A (en) Electric wave absorbent
JPS5525856A (en) Magnetic recording medium
JPS57183629A (en) Magnetic coat medium of vertical orientation and its production
JPS5517816A (en) Magnetic recording media
JPS5556605A (en) Magnetic recording medium
JPS5572008A (en) Preparation of ferromagnetic powder
JPS5572007A (en) Magnetic material
JPS5661033A (en) Magnetic recording medium
JPS5383707A (en) Magnetic recording medium composition and preparation thereof
JPS5330800A (en) Peparing magnetic thin film
JPS5522247A (en) Magnetic recording medium
JPS547310A (en) Magnetic coating composition
JPS5583208A (en) Preparation of ferromagnetic powder
JPS5548833A (en) Magnetic recording media
JPS56160329A (en) Manufacture of magnetic iron oxide powder
JPS5583207A (en) Preparation of ferromagnetic powder
JPS5528506A (en) Magnetic recording medium
JPS5517835A (en) Magnetic recording media
JPS5242526A (en) Preparation of iron oxide pigment