中文摘要：

兆兆赫(THz ) 时间域光谱学技术被用来描绘稳固的 n 链烷的冷却过程。n-octadecane， n-nonadecane， n-eicosane， n-heneicosane， n-docosane，和 n-pentacosane 的 THz 波形用上述的 noncontact 与冷却时间被获得光方法。THz 信号的山峰值被发现与 n 链烷的冷却温度有关。THz 波浪对在液体的粒子的尺寸和结构敏感；因此， n 链烷的结晶化过程被监视。一个实验方程基于信号变细被建议到份量上在样品区分结构的顺序的内容变化。结果介绍新 noncontact 为经由 THz 时间域描绘蜡结晶化的光途径光谱学。

英文摘要：

The terahertz （THz） time-domain spectroscopy technique was used to characterize the cooling process of solid n-alkanes. The THz waveforms of n-octadecane, n- nonadecane, n-eicosane, n-heneicosane, n-docosane, and n-pentacosane were obtained with the cooling time using the aforementioned noncontact optical method. The peak values of the THz signal were found to be related to the cooling temperature of n-alkanes. The THz wave was sensitive to the size and structure of particles in the liquid; therefore, the crystallization process of n-alkanes was monitored. An empirical equation based on signal attenuation was proposed to quantitatively distinguish the content change of structural order in the samples. Results present a new noncontact optical approach for characteriz- ing wax crystallization via THz time-domain spectroscopy.