【摘要】 介绍了由ADU和AUC分解还原得到的UO₂粉末氧化过程的差热（DTA）、热重（TG）同时热分析,讨论了UO₂粉末的热分析结果与其成型烧结性、比表面、高价铀化物存在的关系,得出了检验UO₂粉末烧结性、高价铀化物存在的判据。并且根据热分析检验UO₂粉末内高价铀化物的存在,可判别ADU和AUC分解还原是否充分,UO₂是否氧化等,这对UO₂粉末的性能检验及其芯块研制过程中的质量控制起了重要作用。更多还原

【Abstract】 The simultaneous thermal analysis of differential thermal analysis (DTA) and thermogravimetry (TG) of UO2 powder obtained from the decomposition and reduction of ammonium diuranate (ADU) and ammoniun uranyl carbonate (AUC) is presented. Relations between the results of thermal analysis and the forming, sintering, specific suface area and existence of higher uranium oxides are discussed. Criteria to judge the performance of sintering of UO2 powder and existence of higher uranium oxides have been obtained. The completeness of decomposition and reduction of ADU and AUC as well as the oxidization of UO2 powder can be determined by the thermal analysis. It is of great importance for performance testing of UO2 powder and quality control in the fabrication of UO2 pellets.更多还原