无钴p型方钴矿热电材料的制备及热电性能研究

采用熔体旋甩结合热压烧结技术,制备了无钴p型方钴矿热电材料。利用X射线衍射仪以及扫描电子显微镜对其组织结构进行分析,并对烧结后的样品进行热电性能研究。结果表明,Fe和Ni可有效地取代Co,获得纯的方钴矿相。另外,即使无钴样品的高温ZT值略低于参比样品,但功率因子及低温ZT值基本相当,这对节约Co这一战略资源以及实现产业化应用具有重要的意义。

Preparation and thermoelectric properties of Co-free p-typeskutterudite thermoelectric material

Co-free p-type skutterudite were successfully synthesized by melt-spinning combining with hot press sintering method.The microstructure of samples was analyzed by X-ray diffractometer(XRD)and scanning electron microscopy(SEM).The sintered bulk samples were investigated for thermoelectric properties.The results showed that Co could be nicely replaced by Fe and Ni to obtain the pure skutterudite phase.In addition,although the high temperature ZT value of Co-free p-type skutterudite sample was a little bit lower than that of the reference sample,the power factor and low temperature ZT was basically equivalent,which was of great significance to saving the strategic resource Co and realizing industrial application.