“稳态对比法”测量不良导体的导热系数

以稳态法的实验装置为基础,通过调节加热源的电压保证待测样品及标样的散热盘的散热温度(电压)相同,记下加热盘和散热盘的温度(电压),根据傅里叶导热方程,以及标准样品的导热系数直接获得待测样品的导热系数.该方法避免了传统方法因散热盘散热过程的理论处理及数据读取引入的误差.

Measuring thermal conductivity of poor conductor by stable-state comparative method

The comparative measurement of the thermal conductivity was finished directly using the device of stable-state method.The voltage of the heating source was adjusted so that the temperature of the sample cooling plate was the same as that of the reference sample’s cooling plate,and then the temperatures of the sample’s heating plate and the cooling plate were recorded.According to Fourier heat conduction equation and the thermal conductivity of the reference sample,the thermal conductivity of the sample was derived directly.The new method avoided the errors caused by the theoretical treatment and the data of heat dissipation in the traditional way.