石墨化阴极炭材料热物性测试研究(英文)

Investigation on Thermo-physical Properties of Graphitized Carbon Materials

对经典的周期热流法测试原理进行深入分析,根据实验模型和石墨化阴极炭块材料性能的特点,设计开发了一套铝电解槽用阴极碳素材料瞬态热物性测试系统。采用两路热电偶来检测通过试样的正弦温度信号,根据信号在试样内传播时产生的振幅衰减和相位滞后,可以直接计算出导温系数,在已知密度和比热参数的情况下可以计算出导热系数。在20～300℃的范围内,测定装置操作方便,数据可靠。对计算方法和测试系统的研究,为获得可靠的热物性数据提供了有效的途径。

A transient experimental system was designed to determine the thermo-physical properties of the graphitized carbon material for aluminum reduction industry by employing modern electrical facilities and data acquisition apparatus. The periodic heat flow was recognized by the two thermocouples as a sinus temperature variation with decreasing amplitude and increasing phase lag when the heat wave propagated through the specimen. The thermal diffusivity can be calculated directly by processing experimental data, and then the thermal conductivity can be obtained with relation to thermal diffusivity if the specific heat and the density are known. The measuring system and the instrument are applicable in the temperature 20 -300℃. The method will pave a way to obtain the available thermo - physical properties data.