Ferrite magnet powder, sintered magnet, bond magnet, and...

Details Ferrite magnet powder, sintered magnet, bond magnet, and... Ferrite magnet powder, sintered magnet, bond magnet, and...

2011-02-01

2011-02-01

Rickman, Holly (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C252S062630, C252S062620

Reexamination Certificate

active

07879469

ABSTRACT:
A ferrite magnet powder is represented by the composition formula AFe2+a(1-x)MaxFe3+bO27, wherein A represents at least one element selected from the group consisting of Sr, Ba, and Pb; and M represents at least one element selected from the group consisting of Zn, Co, Mn, and Ni, and wherein 0.05≦x≦0.80, 1.5≦a≦2.2, and 12≦b≦17. A high saturation magnetization 4πIs can be achieved by the partial substitution of the Fe2+site of a W-type ferrite with an element M such as Zn within a certain range.

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English Translation of JP 02180004 A (PTO 09-1223) Jul. 12, 1990.
Yamamoto et al. “Magnetic Properties of Ba-Zn-System W-Type Hexagonal Ferrite Magnets” IEEE Journal on Magenetic, vol. 8, No. 11, Nov. 1993 (Japan) pp. 763-769.

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