中文摘要：

采用非等温DSC法，对过冷条件下水滴的液-固相变动力学特性进行了研究，获得了水滴结晶过程的速率常数、时间指数和Avrami数。研究表明，降温速率对水的结晶行为影响较大。降温速率越大，则结晶速率越大，结晶峰温和结晶初始温度向低温方向移动，结晶的完善程度相对越差。在-40℃-0℃温度范围，水滴的结晶以异相成核的三维球晶方式生长。

英文摘要：

The non-isothermal crystallization behavior and kinetics of supercooled water droplets were investigated by means ot me differential scanning calorimetry （DSC） method and the rate constant, time index and Avrami index of crystallization were obtained. The results show that the cooling rate has great influence on the crystallization behavior of water. The crystallization rate increases and the initial temperature and peak temperature of crystallization decrease with the increase of the cooling rate. In the temperature range of-40℃-0℃, the crystallization exhibits three-dimensional spherulitic growth on heterogeneous nuclei.