低纯度钕稀土铁硼永磁合金的磁性研究

应用科学学报 ›› 1988, Vol. 6 ›› Issue (3): 241-244.

低纯度钕稀土铁硼永磁合金的磁性研究

龚伟¹, 王亦忠¹, 冯敏英¹, 王震西¹, 黄永成², 曹用景²

1. 中国科学院物理研究所;
2. 中国科学院电子学研究所

收稿日期:1985-08-21 修回日期:1986-02-14 出版日期:1988-09-30 发布日期:1988-09-30

STUDIES IN MAGNETIC PROPERTIES OF NdFeB ALLOYS WITH LOW PURITY NEODYMIUM

GONG WEI¹, WANG YIZHONG¹, FENG MINYING¹, WANG ZHENXI¹, HUANG YONGCHBNG², CAO YONGJING²

1. Institute of Physics, Academia Sinica, Beijing;
2. Institute of Electronics, Academia Sinica, Beijing

Received:1985-08-21 Revised:1986-02-14 Online:1988-09-30 Published:1988-09-30

摘要/Abstract

摘要： 选用廉价低纯度钕稀土取代高纯度金属钕,用粉末冶金法制备了Nd-Fe-B永磁体.样品最大磁能积(BH)_max达41MGOe (0.328MT·A/m).使用X射线衍射仪、差热分析仪、磁天平、提拉样品磁强计和脉冲强磁场等实验方法,对Nd-Fe-B合金进行了分析测量.在1400K附近有相变峰.低温下,Nd-Fe-B合金磁滞回线呈现异常,来源于磁体中Nd₂Fe₁₄B主相锥面型各向异性.

Abstract: By substituting low purity neodymium for the high purity one, NdFeB permanent magnets of (BH)_max=41 MGOe were prepared by powder metallurgy. Several properties of NdFeB alloys were measured by means of x-ray diffraction, the differential thermal analyzer, magnetic balance, extracting sample magnetometer and pulse high magnetic field apparatus respectively. The results show that there is a peak of phase transition at 1439K, and the abnormal phenomenon on the magnetic hysteresis loop at low temperature originates from the conical magneto-crystalline anisotropy of the major phase Nd₂Fe₁₄ in the NdFeB alloys.

龚伟, 王亦忠, 冯敏英, 王震西, 黄永成, 曹用景. 低纯度钕稀土铁硼永磁合金的磁性研究[J]. 应用科学学报, 1988, 6(3): 241-244.

GONG WEI, WANG YIZHONG, FENG MINYING, WANG ZHENXI, HUANG YONGCHBNG, CAO YONGJING. STUDIES IN MAGNETIC PROPERTIES OF NdFeB ALLOYS WITH LOW PURITY NEODYMIUM[J]. Journal of Applied Sciences, 1988, 6(3): 241-244.