Comparative study of thermal decomposition of the sol–gel products of U and Ce by external and internal gelation processes
| Autor: | N.P Bhat, H.P Nawada, K. Suresh Kumar |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Nuclear and High Energy Physics
Thermal decomposition Analytical chemistry chemistry.chemical_element Chemical reaction Cerium chemistry.chemical_compound Nuclear Energy and Engineering chemistry X-ray crystallography Urea General Materials Science Thermal analysis Pyrolysis Powder diffraction Nuclear chemistry |
| Zdroj: | Journal of Nuclear Materials. 321:263-268 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/s0022-3115(03)00278-2 |
| Popis: | The synthesis of U 0.7 Ce 0.3 O 2+ x was carried out using external gelation (with urea/NH 3 solution) and internal gelation (with urea/hexamethylene tetramine). The compounds formed were characterized using thermal analytical techniques in Ar, vacuum and air, X-ray powder diffraction and effluent gas analysis by mass spectrometry. The compound formed through external gelation was found to form UO 3 as an intermediate product (identified by O 2 loss to form U 3 O 8 ) whereas the compound formed through internal gelation resulted in single-phase UO 2 , which could be sintered into homogeneous pellets with 97% th.d. in Ar + 2% H 2 atmosphere at temperatures as low as 1100 °C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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