【摘要】 本文介绍了一种用于固体导热系数测量的新仪器。测量原理采用导热系数λ的新算式；测量控制选用可编程控制器；测量范围0．023 4～2．328 W/(m·K)。仪器具有快捷、轻便、测量精度高等特点。实验结果表明,该仪器测量值与文献参照值相差约＜5%。本文研究的结果对研制开发热物性测量具有一定的参考价值。更多还原

【Abstract】 A new portable thermal conductivity measurement instrument is introduced.A new formula of thermal conductivity A is used in the instrument.A programmable logic controller is chosen for the measure- ment and control.The measurement range of the instrument is 0.023 4～2.328 W/(m·K).This instru- ment features quick operation,light weight and high precision.Experiment results show that comparing with the reference values in literatures,the relative error of this instrument is less than 5%.The research results are valuable in the research of material thermal characteristic measurement.更多还原