Permanent magnet composition
AssigneeFuji Electrochemical Co., Ltd.
InventorsTakaaki Yasumura, Teruo Kiyomiya, Yasutoshi Mizuno, Kazuo Matsui
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Abstract
An improved permanent magnet composition comprising 22 to 28 wt % R, 5 to 16 wt % iron, 0.2 to 6.5 wt % copper, 0.1 to 6 wt % manganese, 0.5 to 6 wt % A, 0.1 to 2 wt % B and the balance cobalt, in which R is at least one of rare earth elements including yttrium, A is at least one of zinc and zirconium and B is at least one element selected from the group of aluminum, bismath and thallium.
Claims2
A permanent magnet composition comprising:
- 22 to 28 wt % R, R being at least one of rare earth elements including yttrium;
- 5 to 16 wt % iron;
- 0.2 to 6.5 wt % copper;
- 0.1 to 6 wt % manganese;
- 0.5 to 6 wt % A, A being at least one element selected from the group of zinc and zirconium;
- 0.1 to 2.5 wt % thallium;
- and the balance being cobalt.
A permanent magnet composition comprising 22 to 28 wt % R (which is at least one of the rare earth elements including yttrium), 5 to 16 wt % iron, 0.2 to 6.5 wt % copper, 0.1 to 6 wt % manganese, 0.5 to 6 wt % A (which is at least one of zinc and zirconium), 0.1 to 2 wt % aluminum, and the balance being cobalt.
Dependencies are inferred from the claim text.