Method for producing a high-performance neodymium—iron—boron rare earth permanent magnetic material
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United States of America Patent
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Aug 30, 2016
Grant Date -
Nov 6, 2014
app pub date -
Oct 9, 2013
filing date -
May 5, 2013
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Abstract
In the method for producing a high-performance neodymium-iron-boron rare earth permanent magnetic material of the present invention, the degree of alignment of the magnet can be improved by preparing the pre-sintered alloy material, the particle size of the powder ground by the jet mill can be refined and the fine powder in the filter of the jet mill can be mixed with the powder collected by the cyclone collector by controlling the oxygen content of the jet mill and adding the nanoscale oxide fine powder. The present invention can significantly improve the utilization ratio of the material and the performance of the magnet, save the use of the rare earth, and especially the heavy rare earth, thereby protecting the scare resources.
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