METHOD FOR PRODUCING A SINTERED R-IRON-BORON MAGNET
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United States of America Patent
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Mar 1, 2018
app pub date -
Aug 29, 2017
filing date -
Aug 31, 2016
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Abstract
A method for producing a sintered R-iron (Fe)-boron (B) magnet, the method including: (1) producing a sintered magnet R1-Fe—B-M; (2) washing the sintered magnet using an acid solution and deionized water, successively, and drying the sintered magnet to yield a treated magnet; (3) mixing a heavy rare earth element powder RX, an organic solid powder EP and an organic solvent ET to yield a slurry RXE, coating the slurry RXE on the surface of the treated magnet, and drying the treated magnet to yield a treatment unit; and (4) heating, quenching, and then aging the treatment unit.
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