| 简介 |
Disclosed is a Ho and W-containing rare-earth magnet. The rare-earth magnet comprises a R2Fe14B type principal phase, and comprises the following raw material components : R : 28wt%to 33wt%, wherein R is a raw-earth element comprising Nd and Ho, and the content of Ho is 0.3wt% to 5wt%; B : 0.8wt% to 1.3wt%; W : 0.0005wt% to 0.03wt%, and the balance of T and inevitable purities, wherein T is an element mainly comprising Fe and/or Co. The rare-earth magnet mainly consists of a W-rich grain boundary phase and a Ho-rich principal phase; crystal grain growth of the Ho-containing magnet in a sintering process is constrained by the trace of W, thereby preventing AGG from occurring on the Ho-containing magnet, and obtaining a magnet with high coercivity and high heat resistance. |
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