1. School of Automotive Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. School of Material Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China; 3. Functional Materials Research Institute, China Iron and Steel Research Institute Group, Beijing 100081, China
Improved Electrical Insulation of Rare Earth Permanent Magnetic Materials With High Magnetic Properties
1. School of Automotive Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. School of Material Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China; 3. Functional Materials Research Institute, China Iron and Steel Research Institute Group, Beijing 100081, China
ժҪ Rare earth permanent magnetic materials are typical electrical conductor, and their magnetic properties will decrease because of the eddy current effect, so it is difficult to keep them stable for a long enough time under a high frequency AC field. In the present study, as far as rare earth permanent magnets are concerned, for the first time, rare earth permanent magnets with strong electrical insulation and high magnetic performance have been obtained through experiments, and their properties are as follows: (1) Sm2TM17: Br=0��62 T, jHc=803��7 kA/m, (BH)m=58��97 kJ/m3, ��=7 ����m; (2) NdFeB: Br=0��485 T, jHc=766��33 kA/m, (BH)m=37��96 kJ/m3, ��=9 ����m. The magnetic properties of Sm2TM17 and NdFeB are obviously higher than those of ferrite permanent magnet, and the electric insulating characteristics of Sm2TM17 and NdFeB applied have in fact been approximately the same as those of ferrite. Therefore, Sm2TM17 and NdFeB will possess the ability to take the place of ferrite under a certain high frequency AC electric field.
Abstract��Rare earth permanent magnetic materials are typical electrical conductor, and their magnetic properties will decrease because of the eddy current effect, so it is difficult to keep them stable for a long enough time under a high frequency AC field. In the present study, as far as rare earth permanent magnets are concerned, for the first time, rare earth permanent magnets with strong electrical insulation and high magnetic performance have been obtained through experiments, and their properties are as follows: (1) Sm2TM17: Br=0��62 T, jHc=803��7 kA/m, (BH)m=58��97 kJ/m3, ��=7 ����m; (2) NdFeB: Br=0��485 T, jHc=766��33 kA/m, (BH)m=37��96 kJ/m3, ��=9 ����m. The magnetic properties of Sm2TM17 and NdFeB are obviously higher than those of ferrite permanent magnet, and the electric insulating characteristics of Sm2TM17 and NdFeB applied have in fact been approximately the same as those of ferrite. Therefore, Sm2TM17 and NdFeB will possess the ability to take the place of ferrite under a certain high frequency AC electric field.
CHANG Ying;WANG Da��peng;LI Wei;PAN Wei;YU Xiao��jun;QI Min. Improved Electrical Insulation of Rare Earth Permanent Magnetic Materials With High Magnetic Properties[J]. �й������ڿ���, 2009, 16(2): 84-0.
CHANG Ying;WANG Da��peng;LI Wei;PAN Wei;YU Xiao��jun;QI Min. Improved Electrical Insulation of Rare Earth Permanent Magnetic Materials With High Magnetic Properties. Chinese Journal of Iron and Steel, 2009, 16(2): 84-0.
2009, Vol. 16 
