高压制备CoSbS1-xSex(x=0~0.3)的热电性能  

High Pressure Synthesis and Thermoelectric Performance of CoSbS1-xSex(x=0~0.3)

作　　者：朱红玉[1] 宿太超[2] 李洪涛 杨曼曼 杜景阳 李尚升[1] 胡美华[2] 胡强[1] 杜保立[1] Zhu Hongyu;Su Taichao;Li Hongtao;Yang Manman;Du Jingyang;Li Shangsheng;Hu Meihua;Hu Qiang;Du Baoli(School of Physics and Electronic Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Henan Key Laboratory of Materials on Deep-Earth Science and Technology,Henan Joint International Research Laboratory for High Performance Metallic Material and Their Numerical Simulation,Henan Polytechnic University,Jiaozuo 454000,China;Shanghai Customs District P.R.China,Shanghai 200135,China)

机构地区：[1]河南理工大学物理电子与信息学院,河南焦作454000 [2]河南理工大学河南省深度材料科学与技术重点实验室,河南省高性能金属材料及其数值模拟国际联合实验室,河南焦作454000 [3]中华人民共和国上海海关,上海200135

出　　处：《稀有金属材料与工程》2020年第4期1422-1426,共5页Rare Metal Materials and Engineering

基　　金：河南省自然科学基金(182300410248);河南理工大学杰出青年基金(J2016-5);中华人民共和国上海海关科研计划项目(HK012-2018);国家自然科学基金(51772076);河南理工大学博士基金(B2019-18)。

摘　　要：利用一步高压烧结方法制备了CoSbS1-xSex基固溶体合金,测试并分析了其结构和热电性能。结果表明,高压能够加快反应速率,快速制备出单相CoSbS化合物;加入少量Se能够同步优化3个热电参数:即提高Seebeck系数,降低电阻率和热导率。在673 K时,CoSbS0.8Se0.2具有最大的品质因子ZT^0.25,约为母体材料CoSbS的4倍,而且在相同温度条件下高压合成样品的ZT远高于传统方法(固相反应结合放电等离子体烧结)制备CoSbS1-xSex的数值。这些结果表明,高压方法是制备CoSbS基热电材料的一种有效方法。CoSbS1-xSex based solid solution alloys were prepared by one-step high pressure method.The structures and thermoelectric properties were investigated.The results show that high pressure can accelerate the reaction rate and fabricate single-phase CoSbS quickly.Alloying with a small amount of Se can simultaneously optimize three thermoelectric parameters:increasing Seebeck coefficient,reducing resistivity and thermal conductivity.CoSbS0.8Se0.2 has the largest figure of merit ZT^0.25 at 673 K,which is about four times as much as that of the parent material CoSbS.Moreover,the ZT of high-pressure synthesized samples at the same temperature is higher than that of CoSbS1-xSex prepared by the traditional solid-state reaction combined with spark plasma sintering method.These results indicate that high pressure method is an effective method for preparing CoSbS based thermoelectric materials.

关 键 词：CoSbS 高压 热电材料 

分 类 号：TB34[一般工业技术—材料科学与工程]