The Study on Thermal Properties of Solid Solution (K, NH4)Cl
Solid solutions with different compositions, mNH4Cl·KCl and NH4Cl·nKCl (m，n≥1), were prepared by the constant speed cooling method. The thermal stability of the solid solutions was determined by TG-DTA. The results show that mNH4Cl·KCl crystals change its crystal form at 180°C, decompose into ammonia and hydrogen chloride gas at 330°C, melt at 790°C, and finally evaporate at around 820°C. Its evaporation temperature increases with the increasing of potassium chloride content in the samples. The Solid solution of NH4Cl·nKCl decomposes to ammonia and hydrogen chloride gas at 230°C, melts at 790°C, and evaporates at 800°C. The continuous specific heat curve of the solid solution (NH4, K)Cl were also determined. These data provide a theoretical basis for further research on solid solution properties.
Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao
J. S. Yuan et al., "The Study on Thermal Properties of Solid Solution (K, NH4)Cl", Advanced Materials Research, Vols. 236-238, pp. 357-361, 2011