TCI导热仪测试材料导热系数的影响因素分析  

The influence factor analysis of testing material thermal conductivity with TCI thermal conductivity meter

作　　者：顼永亮 周亚素[1] 王思[1] XU Yongliang;ZHOU Yasu;WANG Si(College of Environmental Science and Engineering, Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《中国测试》2016年第7期136-140,共5页China Measurement & Test

摘　　要：阐述基于瞬态平面热源法的TCI导热仪测试原理,通过对蒸馏水、Pyrex耐热玻璃、耐高温陶瓷、LAF6720泡沫材料导热系数的测量研究,分析影响TCI导热仪测试精度的因素。结果显示:TCI导热仪对于常见材料导热系数的测试结果具有较好的精度和可重复性,测试过程中需选择合适的校准方式,对固体材料需添加媒介以减小接触热阻。此外,对于测试时需添加触媒介质的固体材料连续测试时间不宜过长,最好不要超过20 min。This paper explained testing principle of TCI thermal conductivity meter based on thetransient plane source method. Good accuracy and repeatability of the TCI were verified andproved by testing four reference materials: distilled water, LAF6720, Pyrex and pyroceram. Theauthors also studied the influence factor which may affect the accuracy when testing the materialswith TCI. Results showed that choosing the appropriate calibration and reducing the thermal contactresistance are essential to improve the testing accuracy. Also, the duration of continuous testingwhich requires contact agent should not be too long, not more than 20 minutes preferably.

关 键 词：瞬态平面热源法 导热系数 校准方式 接触热阻 测试时间 

分 类 号：TK124[动力工程及工程热物理—工程热物理]