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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。
Based on the analysis of the test principle of classical periodic heat flux method, a set of transient thermophysical properties test system of cathode carbon material for aluminum reduction cell was designed and developed according to the characteristics of experimental model and graphitized cathode carbon block material. Two thermocouples are used to detect the sinusoidal temperature signal passing through the sample. The attenuation and the phase lag of the signal when propagating in the sample can be used to directly calculate the temperature coefficient. Under known density and specific heat parameters Thermal conductivity can be calculated. In the range of 20 ~ 300 ℃, the measuring device is easy to operate and the data is reliable. Research on calculation methods and test systems provides an effective way to obtain reliable thermophysical properties data.