采用悬浮真空熔炼和 800℃, 168h真空退火方法制备了含稀土 Sm的 FeSi2基金属硅化物,并对其晶体结构、Seebeck系数、电阻率进行了初步研究.实验发现,名义组成为 Fe0.6Sm0.4Si2的试样的热电功率因子从室温时的 0.26× 10-4W@ m-1K-2随温度上升到 500℃时的 1.6× 10-4W@ m-1K-2,比不含 Sm或含 Sm量很少的对比试样高一个数量级左右.其原因被认为是由于 Sm的外层 4f电子的贡献.
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