Wenjie Wei, Shu Li, Zemeng Weng, Boya Zhang, Zhanmin Cao
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引用次数: 0
摘要
Nd2O3-SiO2-FeO-Fe2O3 体系的相图信息是设计和开发通过高温冶金工艺回收钕铁硼磁体的熔渣的基础。采用高温等温平衡技术，在 1773 K 的空气中研究了 Nd2O3-SiO2-FeO-Fe2O3 体系的平衡相关系，然后进行了淬火。通过对淬火样品进行 X 射线衍射（XRD）和扫描电子显微镜与能量色散光谱（SEM-EDS）分析，观察到七个两相平衡区和七个三相平衡区。发现了三元化合物 Nd9.33Si6-xFexO26-δ 和 Nd0.67Si0.13Fe0.2Oδ。为 Nd2O3-SiO2-FeO-Fe2O3 系统构建了 1773 K 等温截面。
Phase Diagram Study of the Nd2O3-SiO2-FeO-Fe2O3 System at 1773 K in Air
The phase diagram information of the Nd2O3-SiO2-FeO-Fe2O3 system is basic for the design and development of slag for recycling NdFeB magnets by pyrometallurgical processes. The equilibria phase relations of the Nd2O3-SiO2-FeO-Fe2O3 system were investigated at 1773 K in air using a high-temperature isothermal equilibration technique followed by quenching. Seven two-phase equilibria regions and seven three-phase equilibria regions were observed by X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS) analysis of quenched samples. Ternary compounds Nd9.33Si6−xFexO26-δ and Nd0.67Si0.13Fe0.2Oδ were found. The 1773 K isothermal section was constructed for the Nd2O3-SiO2-FeO-Fe2O3 system.
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