Structure and Magnetic Properties of Sm-Fe-N Prepared by Nitriding High Purity Sm2Fe17 Grown from Sm-Rich Melt
We report on a novel method for preparation of high purity Sm2Fe17 phase by removing the liquid impurity phase from the Sm-rich precursor at high temperatures. With decreasing Sm addition, the percentage of liquid phase left as impurity is decreasing. Nitrogen absorption to the Sm2Fe17 powders results in a complete formation of Sm2Fe17N3, which shows a weak disproportionation reaction at 773 K. The magnetic performance of the Sm2Fe17N3 from precursors with different Sm content is improving with decreasing Sm content.
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
W. Jiang et al., "Structure and Magnetic Properties of Sm-Fe-N Prepared by Nitriding High Purity Sm2Fe17 Grown from Sm-Rich Melt", Advanced Materials Research, Vols. 287-290, pp. 875-878, 2011