采用真空熔炼/放电等离子烧结(SPS)方法制备P型Zn4-xCuxSb3-xBix(x=0～0.8)材料,研究该合金的组织结构和热电性能.结果表明,x＜0.2时,Zn4-xCuxSb3-xBix材料的Seebeck系数随x值增大而增大,当x=0.2时达到最大值;而当x＞0.2后,Seebeck系数又随x值增大而下降.在x=0.2和487 K的条件下,Seebeck系数达到最大值,为249.2 (V/K.合金的电导率随Cu和Bi含量增加而增大.借助Zn4-xCuxSb3的热扩散系数,计算得到材料的热导率随x值增大而增大;在574 K,x=0.4时,Zn4-xCuxSb3-xBix合金的最大热电优值(ZT)为0.53,比同温度下β-Zn4Sb3合金的ZT值大0.07.
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