Process for producing rare earth magnet

Details Process for producing rare earth magnet Process for producing rare earth magnet

1991-01-18

1992-02-11

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

419 12, 419 35, 148104, H01F 102

Patent

active

050873024

ABSTRACT:
A process for producing a rare earth magnet of magnetically improved performance wherein a specific titanate coupling agent is added in one step of the process to enhance the oxidation resistance of the raw materials during production and a special degassing step is incorporated to allow for the removal of the residual titanate coupling agent. The resultant rare earth magnet exhibits improved maximum magnetic energy product ((BH).sub.max) and magnetic coercive force (H.sub.c) as well as other magnetic properties. Rare earth magnet produced by the process is also disclosed.

REFERENCES:
patent: 3821035 (1974-06-01), Martin
patent: 3892600 (1975-07-01), Smeggil et al.
patent: 3964939 (1976-06-01), Chandross et al.
patent: 4497722 (1985-02-01), Tschida et al.
patent: 4597938 (1986-07-01), Matsuura et al.

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