Wenjie Wei, Shu Li, Zemeng Weng, Boya Zhang, Zhanmin Cao
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引用次数: 0
Abstract
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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