【摘要】 本文利用DSC,TG-DTA,X射线衍射,变温红外光谱和溶解性试验方法,系统地研究了Keggin结构杂多酸H_nXM₁₂O₄₀（X=Si,P,Ge;M=Mo,W）的热稳定性,提出杂多化合物热分解的新判据,给出了Keggin结构杂多酸的热分解过程,推导出预测热分解温度的半经验公式.更多还原

【Abstract】 In this paper, the thermal stability of heteropolyacids with Keggin structure HnXM12O40 (X=Si, P, Ge; M =Mo, W) were studied systematically by DSC, TG-DAT, X-ray diffraction, IR spectra at various temperatures and solubility experimental methods. The new criterion of thermal decomposition for heteropoly compounds was proposed. The mechanism of thermal decomposition for heteropolyacids with Keggin structure was presented. A semi-empirical equation being used to predict the thermal decomposition temperatures was obtained. The reaction order and activation energy in every step of loss weight was calculated.更多还原