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Kinetics of thermal decomposition of gelled UO3 microspheres

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Abstract

The kinetics of decomposition of gelled UO3 microspheres has been studied by thermal analysis (DTA and TG) and by X-ray examination. UO3 microspheres prepared via a hydrolysis process were used in the study. The DTA and TG curves were obtained in various atmospheres at different heating rates. The activation energies for the various stages of decomposition were calculated using the Carrol and Manche method.

Zusammenfassung

Die Kinetik der Zersetzung von Gel UO3 Mikrokügelchen wurde mittels Thermoanalyse (DTA und TG) und Röntgenstrukturanalyse untersucht. Die in dieser Abhandlung benutzten UO3 Mikrokügelchen wurden unter Zuhilfenahme von Hydrolyseprozessen hergestellt. Die DTA- und TG-Kurven wurden in verschiedenen Atmosphären und bei verschiedenen Aufheizgeschwindikeiten aufgenommen. Mit der Methode von Carrol und Manche wurden die Aktivierungsenergien für die einzelnen Schritte der Zersetzung berechnet.

Резюме

Методом ДТА, ТГ и рентг еноструктурного анализа изучена кине тика разложения микросферического г елеобразного UO3, получ енного путем гидролиза. Крив ые ДТА и ТГ были измерены в различной атмосфере и при разли чных скоростях нагрева. Эн ергии активации различных стадий раз ложения были вычисле ны по методу Кэррола и Мэнча.

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The authors wish to express their thanks to Professor F. H. Hammad for his guidance and encouragement throughout this work.

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Bishay, A.F., Abdel-Halim, A.S. & Abadir, M.F. Kinetics of thermal decomposition of gelled UO3 microspheres. Journal of Thermal Analysis 32, 1877–1881 (1987). https://doi.org/10.1007/BF01913980

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  • DOI: https://doi.org/10.1007/BF01913980

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