本文用半微量相平衡方法研究了Dy(NO_3)_3·3H_2O-18C6-CH_3OH三元体系在25℃时的溶解度,结果发现在该体系中只有一种化学计量的配合物生成。系统比较了三水合硝酸镝与冠醚18C6在不同溶剂中的配合行为。考察了配合物组成与其存在条件的关系。通过IR,DTG,TG和DSC研究了配合物的组成和性质。用DSC测得配合物脱水和快速热分解过程的焓变,并求得表现活化能。 In this paper, the solubility of Dy (NO_3) _3 · 3H_2O-18C6-CH_3OH ternary system at 25 ℃ was studied by semi-micro phase equilibrium method. It was found that only one stoichiometric complex was formed in this system. The synergistic behavior between dysprosium nitrate trihydrate and crown ether 18C6 in different solvents was systematically investigated. The relationship between the complex composition and its existing conditions was investigated. The composition and properties of the complexes were investigated by IR, DTG, TG and DSC. The enthalpy change of dehydration and rapid thermal decomposition of the complex was measured by DSC and the activation energy was obtained.