过渡金属高锰硅化合物MuSi1.7作为半导体和难熔金属硅化物,具有热电应用的前景.尽管对MnSi1.7热电材料的研究已进行多年,但若要实现商业化应用,在制备和性能优化等方面还有很多问题需要解决.本文利用高温烧结的方法,在氮气氛保护下成功地制备出了锰硅块材化合物,研究了样品中所含的相结构及其所占比例(特别是MnSi1.7相)与烧结温度、保温时间的关系及它们对热电性能的影响.实验发现,MnSi1.7相所占的比例随着烧结温度的升高和保温时间的增加而增加,但材料的塞贝克系数在增大到某一饱和值后就不再增加了.
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