Structural study of (N2H5,H)2.9U1.1Ce0.9(C2O4)5·10H2O from a conventional X-ray diffraction diagram obtained on a powder synthesized by a fast vortex process

Brackx, Emmanuelle; Laval, J.Y.; Dugne, O.; Feraud, Jean-Pierre; Arab-Chapelet, Bénédicte

doi:10.1016/j.jssc.2014.09.030

Cited by 1 publication

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On this basis, one can conclude that the precipitation step yielded to the formation of (Th,Y)(C2O4)2.2H2O solid solutions. Conversely, the sample prepared for x = 0.22 presented additional XRD lines assigned to the hexagonal structure (space group P63/mmc) already reported by Arab-Chapelet et al for mixed An(IV)/Ln(III) or An(IV)/An(III) oxalates [33,34]. Also, the position of the PXRD lines observed for this composition appeared to be closed to that noted for x = 0.…”

Section: Characterization and Conversion Of Oxalate Precursorssupporting

confidence: 59%

Preparation, characterization and sintering of yttrium-doped ThO2 for oxygen sensors applications

Gabard

Cherkaski

Clavier

et al. 2016

Journal of Alloys and Compounds

View full text Add to dashboard Cite

The preparation of Th1-xYxO2-x/2 ceramics, to be used as electrolyte in oxygen sensors for sodium-cooled nuclear reactors, was successfully undertaken from oxalate precursors. Such method was found to provide quantitative precipitation of the cations into Th1-xYx(C2O4)2.2H2O solid solutions up to x = 0.15 while a polyphase system was obtained for x = 0.22. The corresponding oxides were obtained through heat treatment in air at 500°C and characterized by the means of PXRD, SEM and statistical X-EDS measurements. The conditions for the densification of Th1-xYxO2-x/2 ceramics were further determined by dilatometry (T = 1575°C, t = 8 hours) resulting in densification rates up to 99%. Finally, a first estimation of the electric properties of the solids was undertaken by impedance spectroscopy. Electrical conductivity was found to increase linearly with the incorporation of Y 3+ content while the associated values of activation energy decreased, with a minimum value of 1.1 eV for Th0.85Y0.15O1.925.

show abstract

Section: Characterization and Conversion Of Oxalate Precursorssupporting

confidence: 59%