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应用ＤＴＡ／Ｔ／ＥＧＤ／ＧＣ在线联用技术，在空气气氛中对Ｇｅ－１３２的热氧化分解反应历程（室温～９２５°Ｃ）进行了研究，应用Ｘ－ｒａｙ仪对Ｇｅ－１３２在不同温度（４５０°Ｃ、６５０°Ｃ、７２０°Ｃ、８００°Ｃ、９２５°Ｃ）下的热氧化分解反应残物作了物相鉴定；测定了Ｇｅ－１３２的ＴＧ／ＤＴＧ曲线（室温～９７０°Ｃ）；在ＤＴＡ／Ｔ／ＧＣ联用曲线的ＧＣ谱图上，检出了各反应温度下的Ｏ２、ＣＯ２和Ｈ２Ｏ及其热氧化分解产物（逸出气）的组成演变规律。从各残物的ＸＲＤ谱图上可观察到，Ｇｅ－１３２的晶相结构破坏到７２０°Ｃ时才析出微量Ｇｅ、ＧｅＯ２，并发现Ｇｅ在８００°Ｃ时被氧化为ＧｅＯ２，至９２５°Ｃ时形成为高纯度ＧｅＯ２。ＴＧＡ定量计算表明，Ｇｅ－１３２在空气气氛中被氧化为ＧｅＯ２的得率与理论计算值相当。综合上述的实验结果与数据分析，对ＤＴＡ曲线上呈现的二个吸热效应和三个放热效应的性质作出了判断和验证，并得出了Ｇｅ－１３２在空气气氛中被氧化为ＧｅＯ２的反应历程。
The thermal oxidative decomposition reaction of Ge-132 (room temperature ~ 925 ° C) was carried out in air atmosphere using DTA / T / EGD / GC online technology. (TG) and DTG curves (at room temperature ~ 970 ° C) of Ge-132 were determined by thermal oxidative decomposition reaction at 450 ° C, 650 ° C, 720 ° C, 800 ° C and 925 ° C. The evolution of the composition of O2, CO2 and H2O and their thermal oxidative decomposition products (evolved gas) at each reaction temperature were detected on the GC trace of the DTA / T / GC combination curve. It can be observed from the XRD spectrum of each residue that the Ge-132 crystal phase structure is destroyed to 720 ° C when a small amount of Ge, GeO2 precipitation and found that Ge was oxidized to GeO2 at 800 ° C to 925 ° C When formed as high purity GeO2. Quantitative TGA calculations show that Ge-132 is oxidized to GeO2 in air at a rate comparable to the theoretical value. Based on the above experimental results and data analysis, the properties of two endothermic effects and three exothermic effects on the DTA curve were judged and verified. The results showed that Ge-132 was oxidized to GeO2 in air atmosphere course.