差热分析的相转变终点和相转变焓Speil公式的理论分析

Theoretical Analysis of the End Point of Phase Change in Differential Thermal Analysis and the General speil Formula About the Latent Heat

本文通过考虑容器和试样内存在温度梯度这一事实,成功地解释了实际DTA曲线上的相变终点,并就相变前后试样的热容量不同这一普遍情况,推导出计算热焓的广义Speil公式。

By considering the temperature-gradient existed in both the sample and its vessel, the end point of phase change in the real differential thermal analysis curve was successfully explained. In the general situation that the heat capacity of sample was changeable, the general Speil formula was obtained.