Chinese Academy of Sciences

Yingli Sun

Xin Zhang

Lei Liu

Zhuang Liu

Aru Yan

Dong Li

The present disclosure discloses a method for the magnetism stabilizing treatment of a permanent magnet material. The method can include the following steps: providing a permanent magnet material having a positive temperature coefficient of coercivity; magnetizing the permanent magnet material at a temperature Twith a range of &#x2212;200 degree centigrades to 200 degree centigrades; and performing a magnetism stabilizing treatment towards the permanent magnet material with temperature decreased in a range of the temperature Tto a temperature T, or at the temperature T.

Magnetization stabilizing treatment method for permanently magnetizable material

The present disclosure discloses a high-temperature-stability permanent magnet material and an application thereof. The microstructure of the permanent magnet material comprises a first magnetic phase and a second magnetic phase; the first magnetic phase is a magnetic phase with uniaxial anisotropy, and the second magnetic phase is a magnetic phase with spin reorientation transition; and the first magnetic phase and the second magnetic phase are isolated from each other; and the absolute value of the temperature coefficient of saturation magnetization intensity of the first magnetic phase is less than 0.02%/&#xb0; C. By means of the permanent magnet material comprising the first magnetic phase and the second magnetic phase, a positive temperature coefficient of coercivity can be obtained, so that obtaining a low temperature coefficient of coercivity can be targeted, regular and universal.

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Ningbo, China

Yingli Sun