CAJ | 학술논문

在传统的掺杂卤族元素基础上掺杂一定的In元素,制备出高性能的n-PbTe基温差电材料;采用中频感应熔炼炉合金化得到均匀的基体,粉碎,然后在一定温度和压力下压制粉体得到样品锭块.测试了样品的热电性能,并且用场发射透射电镜对样品进行了微观分析,结果表明掺杂合适的Pbl2和In后,可以改善材料的热电性能,在一个较宽的温度范围内材料优值都保持一个较高的值.
재전통적참잡서족원소기출상참잡일정적In원소,제비출고성능적n-PbTe기온차전재료;채용중빈감응용련로합금화득도균균적기체,분쇄,연후재일정온도화압력하압제분체득도양품정괴.측시료양품적열전성능,병차용장발사투사전경대양품진행료미관분석,결과표명참잡합괄적Pbl2화In후,가이개선재료적열전성능,재일개교관적온도범위내재료우치도보지일개교고적치.
Lead telluride is traditional thermoelectric material at middle temperature and widely applied for electricity generation. They have been attracting many scientists to research on. The paper reports an n-type PbTe materials with high thermoelectric performances based on the traditional halogen-doping mechanism with additional indium. The PbTe based materials doped indium and PbI_2 are prepared by powder metallurgy technology. We use an intermediate frequency induced furnace for primary alloy preparation. The alloy shows very homogeneous with the desired composition. Then, the comminuted powder particles are hot pressed under certain temperature, pressure and so on. The authors examined the prepared samples by FETEM and measured their thermoelectric properties. The results indicate that doping with the appropriate PbI_2 and indium improved the thermoelectric properties of the PbTe based materials remarkably, and we gained high figure of merit for the materials over a wide temperature range.