A FEASIBILITY STUDY OF THE PREPARATION OF (U,GD)(3)O-8 SOLID-SOLUTIONS BY THERMAL-DECOMPOSITION OF CO-PRECIPITATED CARBONATE MIXTURES

Authors
RAVINDRAN PV RAJAGOPALAN KV MATHUR PK
Citation
Pv. Ravindran et al., A FEASIBILITY STUDY OF THE PREPARATION OF (U,GD)(3)O-8 SOLID-SOLUTIONS BY THERMAL-DECOMPOSITION OF CO-PRECIPITATED CARBONATE MIXTURES, Journal of nuclear materials, 257(2), 1998, pp. 189-193
Citations number
13
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
Journal title
Journal of nuclear materials → ACNP
ISSN journal
00223115
Volume
257
Issue
2
Year of publication
1998
Pages
189 - 193
Database
ISI
SICI code
0022-3115(1998)257:2<189:AFSOTP>2.0.ZU;2-4
Abstract
Co-precipitation from equimolar nitrate solutions of uranium (VI) and gadolinium has been used to obtain a mixture of (NH4)(4)UO2(CO3)(3) an d Gd-2(CO3)(3) . 3H(2)O at a pre-determined composition. Simultaneous measurements by TG, DTA and evolved gas analysis (EGA) showed that a c alcination temperature of 700 degrees C was necessary to decompose the carbonate completely to oxides. X-ray diffraction data indicated that a solid solution of Gd2O3 in U3O8 cannot be obtained by heating the c arbonate mixtures up to 800 degrees C in inert atmospheres. (C) 1998 E lsevier Science B.V. All rights reserved.