CAJ | 학술논문

采用放电等离子体烧结的方式制备了PbTe基热电材料。研究了Na掺杂的伪三元PbTe0．8‐x Se0．2 Sx （x ＝0，0．05，0．1，0．15）合金的热电输运性能。结果显示：加入PbS导致伪三元PbTe0．8‐x Se0．2 Sx 合金的Seebeck系数略有下降，但 PbS摩尔分数对其Seebeck系数影响不大；合金散射会同时降低伪三元PbTe0．8‐xSe0．2Sx 合金的电导率和晶格热导率；PbS摩尔分数对于伪三元PbTe0．8‐x Se0．2 Sx 合金的热电优值z T的影响不大，所有试样的 z T在820 K时都达到了1．7～1．8。部分PbS取代PbTe可以减少Te元素使用，在保持较高热电性能的前提下降低成本。
채용방전등리자체소결적방식제비료PbTe기열전재료。연구료Na참잡적위삼원PbTe0．8‐x Se0．2 Sx （x ＝0，0．05，0．1，0．15）합금적열전수운성능。결과현시：가입PbS도치위삼원PbTe0．8‐x Se0．2 Sx 합금적Seebeck계수략유하강，단 PbS마이분수대기Seebeck계수영향불대；합금산사회동시강저위삼원PbTe0．8‐xSe0．2Sx 합금적전도솔화정격열도솔；PbS마이분수대우위삼원PbTe0．8‐x Se0．2 Sx 합금적열전우치z T적영향불대，소유시양적 z T재820 K시도체도료1．7～1．8。부분PbS취대PbTe가이감소Te원소사용，재보지교고열전성능적전제하강저성본。
PbTe based thermoelectric materials were prepared by spark plasma sintering method .The thermoelectric properties of pseudo‐ternary PbTe0.8‐xSe0.2Sx(x= 0 ,0 .05 ,0 .1 ,0 .15) alloys doped with Na were investigated .The results show that the content of PbS has no obvious effect on Seebeck coefficient even the values of Seebeck coefficient of the samples alloying with PbS are a little smaller .Alloying with PbS will reduce both the electrical conductivity and the lattice thermal conductivity .High z Ts about 1 .7‐1 .8 can be achieved at 820 K in all samples ,which is not affected by the content of PbS .Substituting partial PbTe with PbS can decrease the consumption of Te ,which will reduce the cost in the condition of remaining the high performance .