Rare earth element permanent magnet material

Details Rare earth element permanent magnet material Rare earth element permanent magnet material

2007-02-13

2007-02-13

Sheehan, John P. (Department: 1742)

Metal treatment

Stock

Magnetic

C148S303000, C075S244000, C420S083000, C420S121000

Reexamination Certificate

active

10415273

ABSTRACT:
A material for a rare earth permanent magnet having a high magnetic coercive force and a high residual magnetic flux density. 28 to 35% by weight of at least one rare earth element selected from the group consisting of neodymium, praseodymium, dysprosium, terbium, and holmium, 0.9 to 1.3% by weight of boron, 0.25 to 3% by weight of phosphorus, iron, and inevitable impurities. It can further comprise 0.1 to 3.6% by weight of cobalt and 0.02 to 0.25% by weight of copper.

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