Abstract
Role ofγ-irradiation and Ba2+ doping on the isothermal decomposition of caesium bromate has been investigated gasometrically. It is seen that decomposition proceeds in a molten/semi-molten state presumably due to formation of an eutectic between the product bromide and the host material, i.e., bromate. The process exhibits stages: (i) initial gas evolution (initial puff) (ii) short acceleratory and (iii) long decay. The data are analysed in the light of theories of different kinetic models like Prout-Tompkins, Avrami-Erofeev and explore that irradiation as well as doping enhance decomposition.
Zusammenfassung
Mittels Gasometrie wurde die Rolle von Bestrahlung und Versetzen mit Ba2+ bei der isothermen Zersetzung von Cäsiumbromat untersucht. Es zeigte sich, daß die Zersetzung in einem geschmolzenen/semi-geschmolzenem Zustand erfolgt, wahrscheinlich infolge der Bildung eines Eutektikums zwischen dem Bromidprodukt und der Wirtssubstanz Bromat. Dieser Prozeß läuft in mehreren Schritten ab: (i) anfängliche Gasentwicklung, (ii) kurze Beschleunigung und (iii) langes Abklingen. Die Angaben wurden hinsichtlich von Theorien verschiedener kinetischer Modelle, wie z.B. Prout-Tompkins oder Avrami-Erofeev untersucht und zeigen, daß sowohl Bestrahlung als auch Versetzen die Zersetzung begünstigen.
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The authors thank the Department of Atomic Energy, Govt. of India, Bombay for financial support which made the work possible.
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Bhatta, D., Padhee, G. Role of γ-irradiation and Ba2+ doping on the isothermal decomposition of caesium bromate. Journal of Thermal Analysis 37, 2693–2699 (1991). https://doi.org/10.1007/BF01912813
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DOI: https://doi.org/10.1007/BF01912813