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首次采用粉末冶金法在大成分范围内制备了赝两元合金(PbTe)1-x(SnTe)x(x=0～1),并对其电学性能进行了系统地研究.实验发现:经550℃烧结后,随合金中SnTe摩尔分数x增大,合金的最大Seebeck系数值减小.当摩尔分数x≤0.6时,最大Seebeck系数所对应的温度逐渐升高;摩尔分数x>0.6时基本不变.当摩尔分数x=0.6时电导率达最大值.经高温烧结后两参数值也有类似的变化规律,但摩尔分数>0.2的各合金Seebeck系数值高于550℃烧结后的合金,电导率降低.从而得出:烧结温度对赝两元合金(PbTe)1-x(SnTe)x的综合电学性能影响不大.
Pseudo binary alloys (PbTe) 1-x (SnTe) x (x = 0 ~ 1) were prepared by the powder metallurgy method for the first time and their electrical properties were systematically studied.It was found that 550% ℃, the maximum Seebeck coefficient decreases as the molar fraction of SnTe in the alloy increases.When the molar fraction x is less than or equal to 0.6, the temperature corresponding to the maximum Seebeck coefficient gradually increases and the mole fraction x> 0.6 is basically not When the molar fraction x = 0.6, the conductivity reached the maximum value. After sintering at high temperature, the two parameters also had similar variation rules. However, the Seebeck coefficient of each alloy with the mole fraction> 0.2 was higher than that of the alloy sintered at 550 ℃. The results show that the sintering temperature has little effect on the general electrical properties of PbTe 1-x (SnTe) x.