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设计了一套测量材料低温比热的装置,在13.81—273.15K范围内,先后用纯铋和无氧铜作为校验样品,测得的比热值与美国珀杜大学(Purdue University)热物理性能研究中心(TPRC)汇集的数据比对,偏差小于2.8％. 从简单固体原子比热的Debye模型出发,提出了低温比热测试中确定最佳温升△T的方程式.给出了误差分析及一些材料的比热测试结果.
A set of devices for measuring the specific heat at low temperature of the material was designed. Within the range of 13.81-273.15K, pure bismuth and oxygen-free copper were used as calibration samples. The measured specific heat value was compared with that of the Purdue University thermophysics (TPRC), the deviation is less than 2.8% .According to the Debye model of simple solid atomic specific heat, an equation to determine the optimal temperature rise △ T in the low temperature specific heat test is presented. The error analysis And some materials of specific heat test results.