A novel method for stoichiometric reduction of (U3O8,PuO2) and its controlled oxidation using microwave
| Autor: | Paru J. Purohit, Amrit Prakash, S. Aher, P.G. Behere, Mohd Afzal, Pradeep Kumar, Geeta Singh, Dasarathi Das, P.M. Khot |
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| Rok vydání: | 2016 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Cost effectiveness Analytical chemistry Mineralogy 02 engineering and technology 021001 nanoscience & nanotechnology 010403 inorganic & nuclear chemistry 01 natural sciences 0104 chemical sciences Reduction (complexity) Nuclear Energy and Engineering Scientific method Specific surface area Mixed oxide General Materials Science Particle size 0210 nano-technology Microwave Stoichiometry |
| Zdroj: | Journal of Nuclear Materials. 479:145-151 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2016.06.053 |
| Popis: | We report a process for stoichiometric reduction of U3O8 and (U3O8,PuO2) mixed oxide powders using an indigenously developed 2.4 GHz microwave processing system. The process parameters were optimized by interpreting reduction kinetic curves at a temperature which is 150 °C lower than the conventional reduction. The process improved the sinterability of the powder which was evaluated in terms of average particle size, BET specific surface area and bulk density. A quick method for controlled oxidation of the reduced powder to incorporate a controlled amount of hyper-stoichiometry was demonstrated by modifying the same reduction process. The percent reduction was measured experimentally using O:(U + Pu) ratio. The X-ray diffraction analysis confirmed the various phases present. The process is novel considering shorter processing cycle, lower temperature processing, improved powder properties, energy efficiency and cost effectiveness. |
| Databáze: | OpenAIRE |
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