C<sub>10</sub>Zn,C<sub>12</sub>Zn及二元体系非等温固-固相变动力学

C₁₀Zn,C₁₂Zn及二元体系非等温固-固相变动力学

摘要: 合成了具有层状钙钛矿结构的两种热致相变材料四氯合锌酸癸铵n-(C₁₀H₂₁NH₃)₂ZnCl₄和四氯合锌酸十二铵n-(C₁₂H₂₅NH₃)₂ZnC₁₄,并在两种材料的乙醇溶液中结晶出一系列二元混合体系.对纯组分及各个二元体系利用差示扫描量热(DSC)测定了热分析曲线,采用Kissinger和Ozawa两种动力学模型研究了非等温固-固相变动力学,计算了固-固相变过程的活化能和反应级数.两种方法的计算结果相一致.

Abstract: The thermotropic phase transitions in the perovskite type-layer compound (n-C₁₀H₂₁NH₃)₂ZnCl₄ and (n-C₁₂H₂₅NH₃)₂ZnCl₄ were synthesized and a series of their mixtures were prepared from ethanol solutions. Nonisothermal kinetics of solid-solid phase transitions in C₁₀Zn, C₁₈Zn and their binary system was investigated by DSC. Kissinger and Ozawa methods were applied to determine the activation energy and reaction order of the solid-solid transitions. The results of two methods are in agreement.