时间延迟对瞬态平面热源法测量热导率的影响  

Effect of time delay on thermal conductivity measurement with transient planar heat source technique

作　　者：王强[1] 戴景民[1] 何小瓦[2] 

机构地区：[1]哈尔滨工业大学自动检测与过程控制系统研究所,哈尔滨150001 [2]航天材料及工艺研究所,北京100076

出　　处：《吉林大学学报（工学版）》2011年第3期711-715,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50336010)

摘　　要：瞬态平面热源法测量热导率时,时间延迟会直接影响热导率测量的准确度。为了对这种影响程度进行评估,本文基于瞬态平面热源法探头表面平均温升理想模型提出了一种可实现时间补偿的改进温升模型,并利用Hot disk热物性分析仪数据采集系统搭载两个不同半径的探头对Pyroceram 9606标准材料在常温常压下的热导率进行了测量。测量结果表明,时间延迟对热导率测量的影响会随着测量参数选择的不同而发生不规律变化,短时间测量的情况相比长时间测量时受时间延迟的影响更加明显,对理想模型进行时间补偿能够较大幅度地提高热导率的测量准确度。The time delay affects directly the measurement accuracy when the thermal conductivity （TC） is measured by the transient plane heat source technique. To investigate this effect degree, an improved model was proposed for the temperature rise with time delay compensation based on the ideal model for the mean temperature rise of the probe surface in the transient planar heat source technique. The TC of the standardized material Pyroceram 9606 at normal temperature and pressure was measured using the developed model and the data acquisition system of the Hot Disk analyser with 2 sensors of different radius. The results indicated that the relative error of TC measurement caused by time delay was sensitive to different choices of the test parameters. The shorter measuring time may result in larger error of TC measurement. The time delay compensation to the ideal model may enhance the TC measurement accuracy.

关 键 词：材料检测与分析技术 热导率 瞬态平面热源法 热物理性质 热盘分析仪 

分 类 号：TB942[一般工业技术—计量学]