热电材料热性能测量研究

发布时间：2018-01-04 11:32

本文关键词：热电材料热性能测量研究　出处：《内蒙古大学》2015年硕士论文　论文类型：学位论文

【摘要】：热电材料可实现热能电能的直接转换,是一种有着广泛应用前景的材料,Seebeck系数、热导率是评价热电材料性能的关键参数,准确测量热电材料的热性能,对研究有着指导性作用。而微纳米尺度的热电材料在尺度和维度方面有较大限制,测量方法更复杂,难度较大,需要搭建复杂的微电极系统。因此搭建热电材料性能测量系统对研究热电材料具有重要支撑作用。目前我国的商业设备在测量微尺度材料热性能方面发展还不成熟,常用测量设备主要依靠进口。Bi2Se3是一种已经商业化的热电材料,本文使用化学气相沉积(CVD)制备了Bi2Se3纳米线,搭建了热电材料性能测量系统,测量了Bi2Se3薄膜和Bi2Se3微尺度薄片的Seebeck系数；结果显示,薄膜的Seebeck系数随着温度的升高有增大的趋势,微尺度薄片的Seebeck系数在307K下的大小为-79μV/K；使用3ω法对石英块体材料的热导率进行了验证,石英玻璃在307K时的热导率为1.48W/m/K。
[Abstract]:Thermoelectric materials can directly convert heat energy to electric energy, is a kind of promising materials, Seebeck coefficient, thermal conductivity is a key parameter to evaluate the performance of thermoelectric materials, thermal properties measurement of thermoelectric materials, has a guiding role for the research. The micro nano scale thermoelectric materials have great limitations in scale and dimension measurement method, more complex, more difficult, need to build a complex system. So the microelectrode to build thermoelectric material performance measurement system has an important supporting role in the research of thermoelectric materials. At present our country's commercial equipment in measuring the thermal properties of micro scale materials development is not mature, the main measuring equipment mainly rely on imports is.Bi2Se3 which has been the commercialization of thermoelectric materials, the use of chemical vapor deposition (CVD) Bi2Se3 nanowires were prepared to build a thermoelectric material performance measurement system, the measurement of Bi2Se3 films Seebeck coefficient and Bi2Se3 micro thin films; results show that the Seebeck coefficient increases with increasing temperature, the size of the Seebeck coefficient of micro scale sheet under 307K -79 V/K; using 3 Omega method to quartz block material thermal conductivity was verified in 307K when the thermal conductivity of quartz glass rate of 1.48W/m/K.

【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB34

【共引文献】