本文采用TG—DTG法研究了Ce(NO_3)_3·nH_2O(n=6,4)的热分解行为,并通过IR和X—射线法对反应物、中间产物和最终产物进行了鉴别。同时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,并根据DSC曲线求出了它们的脱水焓和Ce(NO_3)_3分解为CeO_2的分解焓值。 In this paper, the thermal decomposition behavior of Ce (NO_3) _3 · nH_2O (n = 6,4) was studied by TG-DTG method. The reactants, intermediates and final products were identified by IR and X-ray. At the same time, the apparent activation energy of dehydration was calculated by Kissinger method with TG-DTG curves at different heating rates. Their dehydration enthalpies and decomposition enthalpies of Ce (NO 3) 3 decomposed to CeO 2 were calculated according to DSC curve .