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US 12,531,175 B2Granted
Sintered neodymium iron boron magnet and method of preparing the same
AssigneeJl Mag Rare Earth Co., Ltd.
InventorsHuayun Mao, Congyao Mao, Zhifeng Huang, Changshan Sun, Yunpeng Chen
Life of this patent
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Abstract
A sintered neodymium iron boron magnet as shown in the formula RxT100-x-y1-y2-zMy1Ay2Bz is provided according to the present application, which specifically includes three different technical solutions.
Claims7
A sintered neodymium iron boron magnet is shown in formula (I);
- RxT100-x-y1-y2-zMy1Ay2Bz (I);
- x, y1, y2 and z are mass percentages of corresponding elements, 28.5%≤x≤32.5%, 0%≤y1≤1.0%, 0.67%≤y2≤2.4%, 0.90%≤z≤0.96%;
- R is selected from one or more of Pr, Nd, and Dy, wherein a content of Pr is 5% to 14.5%, a content of Nd is 20% to 25.5%, and a content of Dy is 0 to 3%;
- M is selected from one or more of Ti, Nb;
- and a content of Ti is 0 to 0.1%, a content of Nb is 0 to 0.15%;
- A is Cu, Ga, Al and Zr, wherein a content of Cu is 0.2% to 0.6%, a content of Ga is 0.25% to 0.5%, a content of Al is 0.1% to 0.5%, and a content of Zr is 0.2% to 0.6%;
- and
- T is selected from Fe and Co, a content of Co is 0.5% to 2.5%, and surplus is Fe;
- wherein the sintered neodymium iron boron magnet comprises Zr—Cu alloy phase, Cu—Ga alloy phase, and R6Fe13A compound, wherein the R6Fe13A compound is R6Fe13Cu, R6Fe13Ga, R6Fe13Al and R6Fe13Zr.
6 more elements
Dependencies are inferred from the claim text.