在测定平均比热的诸方法中,以冰卡计法准确度最高,已被许多国家定为标准测试方法。本文在我们建立的国内第一台冰卡计比热仪基础上,对卡计的结构、测试技术和误差又作了进一步的研究和改进,使其性能明显提高。根据实验结果还建立了α-Al_2O_3标样热函和比热的经验方程,方程值与实测值的最大偏差小于±O.65％。 Among the methods for determining the average specific heat, the most accurate method is the ice method, which has been adopted by many countries as a standard test method. Based on the first ice-calorimeter in our country, this paper makes further research and improvement on the structure, testing technology and error of the calorimeter so that its performance is obviously improved. Based on the experimental results, the empirical equation of enthalpy and specific heat of α-Al 2 O 3 standard was also established. The maximum deviation between the equation and the measured value is less than ± 0.65%.