摘要
本文制备了稳定的题目化合物,对所得样品进行了表征。采用TG-DTG法研究了它们的热分解行为,通过IR对反应物、中间产物和最终产物进行了鉴别。发现中间产物有低水合物和碱式盐,最终产物是氧化镜。进行了样品一些脱水过程的动力学研究,借助不同升温速率下的TG—DTG曲线,用Kissinger法计算了它们脱水的表观活化能值,利用DSC法求出了它们的脱水焓值。
This paper reports the preparation and characterization of Yb(NO_3)_3 ·nH_2O(n=5, 3). The thermal decomposition of the compounds has been studied with TG-DTG. The reactants, intermediates and end-products have also been characterized by IR. It was found that the reactants und- erwent a series of decomposition stages, the intermediates were the lower hydrates and basic ytterbium nitrate, and all end-products were the ytt- erbium oxide, Yb_2O_3·In addition, the kinetic study on dehydration of the compounds was carried out. The apparent active tenergy values of dehydr- ation were calculated with Kissinger method by means of TG-DTG curves at variable step-up temperature rates and the enthalpy values of dehyd- ration were found by DSC.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
1989年第1期44-50,共7页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金
关键词
镱化合物
硝酸盐
水合物
热分解
Ytterbium compounds
Nitrate
Hydrates
Preparation
Thermolysis
