Patent ID: 8383252
Filing Date: 2013-02-26
Classification: H01F,Y10T

Abstract:
1. A rare earth magnet comprising a magnet body containing a rare earth element and a protective layer formed on the surface of the magnet body, wherein the protective layer contains an alkali silicate and at least one of zinc and a zinc compound, the zinc and/or the zinc compound are uniformly dispersed in the protective layer, the protective layer is obtained from a solution that has a turbidity of 100 NTU or below, and when the rare earth magnet is subjected to an adhesion test, the adhesion test being characterized by bonding an Al-made stud pin to the rare earth magnet, leaving the bonded rare earth magnet in a 60° C. and 95% RH atmosphere for 24 hours, and attempting to separate the stud pin from the rare earth magnet under an exertion of force of 500 N, the stud pin is not separated from the rare earth magnet.