纳米HNS的等温结晶动力学研究  

Study on Kinetics of Isothermal Crystallization of Nano-HNS

作　　者：马东旭[1] 王晶禹[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《中北大学学报（自然科学版）》2014年第2期161-166,共6页Journal of North University of China(Natural Science Edition)

摘　　要：选用微热量热法研究晶体的结晶行为,相对于常用的差示扫描量热法来说,不受样品量、本身的导热性能、形貌等限制,可以完全检测出样品在各个过程的热交换情况.采用微热量热法研究了纳米HNS的等温结晶行为,结合经典的结晶长大理论,给出了纳米HNS在恒定温度下的结晶长大动力学模型.研究表明:纳米HNS的结晶长大过程是放热过程,其结晶长大机理不服从于BCF理论,但可以给出特定温度下的动力学模型;除此之外,添加纳米HNS晶种的溶液的结晶粒度要大于没有添加任何晶种溶液的结晶粒度.The heat exchange of sample in each process can be completely detected by using microcalorimetry. With respect to the commonly used method of differential scanning calorimetry, the mircrocalorimetry is not limited by the sample volume, the thermal conductivity and its morphology. Isothermal crystallization behavior of nano-HNS was studied with microcalorimetry. Combined with classic crystal growth theory, the crystallization growth kinetics model of nano-HNS was proposed under constant temperature. The research shows that the growth process of nano- HNS is an exothermic process, and the crystal growth mechanism are not subject to the BCF theory, but the crystallization kinetics model can be given in certain temperature. In addition, the grain size of nano-HNS with adding seed is greater than the raw.

关 键 词：纳米HNS 微热量热法 结晶动力学 产热速率 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]