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利用热重分析法、差热分析法、X射线衍射法和红外光谱分析法研究了[Ba(TEA)2](CH3CO2)2的热分解性质。研究发现,在含氧气氛中加热到1200℃,[Ba(TEA)2](CH3CO2)2的分解过程经历了四个阶段。初始样品在熔化之后,在155℃至265℃之间首先分解生成了Ba(CH3CO2)2。而在390℃至480℃的温度区间内,Ba(CH3CO2)2的分解被分成两个步骤;在390℃时,Ba(CH3CO2)2首先分解生成BaC2O4,随后BaC2O4继续分解生成了α-BaCO3;在811℃左右,α-BaCO3相变转化为β-BaCO3。随着温度的升高,伴随着CO2气体的产生,β-BaCO3被最终分解得到BaO。
The thermal decomposition of [Ba (TEA) 2] (CH3CO2) 2 was studied by thermogravimetric analysis, differential thermal analysis, X-ray diffraction and infrared spectroscopy. It has been found that the decomposition of [Ba (TEA) 2] (CH3CO2) 2 has gone through four stages when heated to 1200 ° C in an oxygen-containing atmosphere. After the initial sample was melted, Ba (CH3CO2) 2 was first decomposed to form between 155 ° C and 265 ° C. The decomposition of Ba (CH3CO2) 2 is divided into two steps in the temperature range from 390 ℃ to 480 ℃. At 390 ℃, Ba (CH3CO2) 2 decomposes to BaC2O4 first and then BaC2O4 decomposes to α-BaCO3. At about 811 ℃, α-BaCO3 phase transformation into β-BaCO3. With the increase of temperature, accompanied by the generation of CO2 gas, β-BaCO3 is finally decomposed to obtain BaO.