In situ infrared spectroscopic study on uranium oxides during UO3 carboreduction

Authors
Poncet, F Valdivieso, F Gibert, R Pijolat, M
Citation
F. Poncet et al., In situ infrared spectroscopic study on uranium oxides during UO3 carboreduction, MATER CH PH, 58(1), 1999, pp. 55-57
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS CHEMISTRY AND PHYSICS
ISSN journal
02540584 → ACNP
Volume
58
Issue
1
Year of publication
1999
Pages
55 - 57
Database
ISI
SICI code
0254-0584(19990225)58:1<55:ISISSO>2.0.ZU;2-Y
Abstract
Carboreduction of UO3 has been studied by in situ infrared spectroscopy in order to detect the presence of carbon monoxide during the reduction. From thermogravimetry, the reaction was observed to occur in two steps: (i) redu ction of UO3 to U3O8 by carbon at 440 degrees C and (ii) reduction at 590 d egrees C of U3O8 to UO2 by carbon. No carbon monoxide was observed during t he reaction. Nevertheless, formation of carbonate species is suggested at t emperature above 550 degrees C with absorption bands around 1005 and 1300 c m(-1). (C) 1999 Elsevier Science S.A. All rights reserved.