R-T-B SINTERED MAGNET

摘要

The R-T-B sintered magnet according to the present invention has R2T14B crystal grains, and is characterised by including, at grain boundaries formed by at least two adjacent R2T14B crystal grains, R-O-C concentration sections in which the R, O and C concentration is greater than in the R2T14B crystal grains, with the area of the grain boundaries in a cross-section of the R-T-B sintered magnet taken up by the R-O-C concentration sections being in the range of 10-75% inclusive.