具有不同扩散势垒的p型(Bi1-0.85Sb0.85)2Te3和PbTe二元梯度热电材料的研制
Fabrication and Characters of p-Type (Bi1-0.85Sb0.85)2Te3 and PbTe Two Segments Graded Thermoelectric Materials with Different Barriers
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摘要: 在分析了热电材料的发展背景和研究理论的基础上,采用热压法制备出单体和双层具有不同扩散势垒的(Bi1-0.85Sb0.85)2Te3与PbTe体系二元梯度热电材料.金属,Fe,Ni和Mg被用作层间扩散势全材料.测定了它们的热电性能,分析了它们的物质组成和各层内和层间的成分分布,确定出较好的扩散势垒材料为金属铁和钴.Abstract: On the basis of analysis of developing background and theory of thermoelectric graded materials, p-type (Bi1-0.85Sb0.85)2Te3 and PbTe two segments thermoelectrical graded materials (TGM) with different barriers were fabricated by conventional hot-pressing process. Metals Fe, Ni and Mg were used as barriers between two segments.The thermoelectric properties were measured. The compositions of each layer and composition distributions in and between different layers were detected. It is demonstrated that better diffusion barriers materials were metal Fe.
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