四氯合锌(II)酸二烷基铵及其二元体系固-固相变贮热的动力学研究

Dynamics of Storing Heat in Double Solid State Change

用DSC技术研究CnZnCl(n=12,14,16,18)及其C14ZnCl/C16ZnCl二元体系固-固相变的动力学,借助动力学方程Kissinger法和Ozawa法计算固-固相变过程的动力学参数—活化能(Ea)和反应级数(n),两种方法的结果相符.结果表明它们的固-固相变级数均为1和纯物质的活化能随链长的增加而减小;比较纯物质与二元体系的活化能,发现二元体系的活化能相对较低,因此,从动力学角度讲,二元体系的相变较容易发生.所以在相同的条件下,可以优先考虑应用二元体系.

This paper reports the study of solid-solid phase transitions kinetics in bis(n-alkylammonium) tetrachlorozincate(II) and their binary system by using DSC technique.Kissinger and Ozawa methods are applied to determine the activation energy and the reaction order of the solid-solid phase transitions and come to the same onclusion..The conclusion is drawn that the reaction order of their solid-solid phase transition is one and Ea for pure compounds CnZnCl decreases with increasing the chain length.Compared Ea of pure compounds with binary system,the later has a low Ea,which can make the phase change of the binary system take place easily.Therefore,at the same condition,we can take the binary system as our first choice.