Magnetic recording medium and magnetic particles therefor

Details Magnetic recording medium and magnetic particles therefor Magnetic recording medium and magnetic particles therefor

1984-08-17

1987-09-15

Swisher, Nancy A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428694, 428900, B32B 516

Patent

active

046939318

ABSTRACT:
A magnetic recording medium comprising a nonmagnetic support and a magnetic layer provided thereon is disclosed. The magnetic layer comprises a magnetic recording element and a binder, wherein the magnetic recording element mainly comprises acicular gamma-Fe.sub.2 O.sub.3 particles having an average porosity of not more than 5% by volume, a specific surface area of 24 to 30 m.sup.2 /g and the X-ray diffraction intensity at the face (210) to that at the face (311) of not more than 5%. The magnetic recording medium has improved electromagnetic conversion characteristics such as sensitivity and noise.

REFERENCES:
patent: 4239637 (1980-12-01), Naruse
patent: 4363850 (1982-12-01), Yasui et al.
patent: 4404260 (1983-09-01), Shibata
patent: 4420537 (1983-12-01), Hayama et al.
patent: 4451535 (1984-05-01), Pinguad et al.
patent: 4500599 (1985-02-01), Ogawa et al.
patent: 4571364 (1986-02-01), Kasuga et al.
patent: 4584242 (1986-04-01), Nagai et al.

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