稀土氧化物,氧酸盐和二丁酸盐的磁性性能
Qingpu Wang1, Hyoju Park2, Andrew Ritchhart2
1Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Seattle, Washington 98109, United States.
ACS omega
|January 26, 2026
概括
稀土元素的磁性分离被降水增强. 双酸产生了更大的颗粒,改善了这些有价值的元素的磁性回收.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学
- 磁力学 磁力学 是一种
背景情况:
- 磁性分离是稀土元素回收的关键技术.
- 缺少用于分离的RE材料的磁性特性.
- 沉方法可以提高RE分离的效率和选择性.
研究的目的:
- 为了合成和描述稀土材料的磁性特性.
- 为了研究不同沉剂对磁性行为的影响.
- 为了将材料特性与磁性分离性能相关联.
主要方法:
- 合成稀土 (Pr,Nd,Tb,Dy) 化合物使用氧化物,氧酸盐和迪布酸盐.
- 测量磁性易感度以确定磁性行为 (库里-韦斯定律,反铁磁相关性).
- 粒子形态学和晶体学分析 (X射线衍射,显微镜).
主要成果:
- 所有合成的RE材料都表现出符合库里-韦斯定律的偏磁性行为.
- 在低温下观察到较弱的抗铁磁相关性,在较轻的RE离子 (Pr,Nd) 中更强.
- 双酸产生了有序的金属有机框架,氧酸盐是晶体的,氧化物是无形的.
- 有效的磁矩与基于亨德规则和4f电子配置的理论预测相匹配.
- 磁电泳反应主要取决于粒子大小,而不是金属-连接体相互作用.
- 双酸丁促进了更大的晶体形成,导致磁吸引力增强.
结论:
- 受沉剂影响的颗粒大小是RE元件磁性分离效率的主要因素.
- 迪布酸是一种有前途的沉剂,可以增强稀土元素的磁性回收,因为颗粒的形成更大.
- 了解磁性特性及其与材料结构的关系对于优化稀土分离过程至关重要.
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