摘要
为提高热电材料塞贝克系数的测试准确度,以康铜合金、钴酸钙、碲化铅、氧化锌等典型块体热电材料为测试对象进行一系列测试,研究测温热电偶的塞贝克效应、温差设置、数据处理方式对塞贝克系数测试的影响。结果表明:热电偶的塞贝克效应对Seebeck系数测试准确度的影响是显著的;样品两端温差设置在5~20℃之间,直线拟合方式采用不过原点拟合,可以使Seebeck系数测试结果的准确度得到大幅提高。
In order to improve the accuracy of measurement of Seebeck coefficient,this article made a systematic research of typical thermoelectric materials,including Constantan,Ca3Co4O9,PbTe and ZnO.The impact of Seebeck effect of thermocouples,different temperature settings and the way of curve fitting on the measurement of resistivity were investigated.The results show that the impact of Seebeck effect of thermocouples on the measurement of Seebeck coefficient is obvious.In order to improve the accuracy,temperature difference across the sample should set between 5℃ and 20℃.Moreover,the fitting curve should not be through the origin.
出处
《中国测试》
CAS
北大核心
2014年第4期132-136,共5页
China Measurement & Test
基金
国家自然科学基金-青年科学基金项目(51001042)
国家质量监督检验检疫总局科技计划项目(2012IK049)
关键词
热电材料
塞贝克系数
测试
影响因素
thermoelectric materials
Seebeck coefficient
measurement
influential factor
