| 简介 |
Provided is a rare earth sintered magnet which can attain a high residual magnetic flux density without causing a drop in coercive force or mechanical strength. The above-described problems are resolved by a rare earth sintered magnet which includes a sintered body whose carbon amount as determined by mass spectrometry is between 500 and 1, 500 ppm, wherein a cv-value of the carbon amount on a rupture plane thereof is no greater than 200. The production method for this rare earth sintered magnet includes the steps of : preparing a compacted body by compressing in a magnetic field a raw material alloy powder has a carbon amount of no greater than 1, 200 ppm as determined by mass spectrometry, and a Cmax/Cmin value of 15 or less wherein Cmax and Cmin respectively represent a maximum value and a minimum value of X-ray intensity of characteristic X-rays of carbon as determined by EPMA (Electron Probe Micro Analyzer) ; and sintering the compacted body. |
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