ALEXANDRIA, Va., June 10 -- United States Patent no. 12,293,868, issued on May 6.
"NdFeB permanent magnet with high coercivity and high resistivity and method for preparing the same" was invented by Changjiang Yan (Zhejiang, China), Nijian Qian (Zhejiang, China) and Zhiguo Wu (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention discloses an NdFeB permanent magnet with high coercivity and high resistivity and a method for preparing the same. The method comprises the steps of: spraying powdery slurry containing heavy rare earth compounds, oxides and/or carbides on a flaky NdFeB permanent magnets blank after it is subjected to surface cleaning process; then stacking magnets on top of ea...