Sintering and conductivity of BaCe0.9Y0.1O2.95 synthesized by the sol-gel method - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Power Sources Année : 2011

Sintering and conductivity of BaCe0.9Y0.1O2.95 synthesized by the sol-gel method

Résumé

Ceramic powders of BaCe0.9Y0.1O2.95 (BCY10) have been prepared by the sol-gel method. Barium and yttrium acetate and cerium nitrate were used as ceramic precursors in a water solution. The reaction process studied by DTA-TG and XRD showed that calcination of the precursor powder at T ≥ 1000 ◦C produces a single perovskite phase. The densification behaviour of green compacts studied by constant heating rate dilatometry revealed that the shrinkage rate was maximal at 1430 ◦C. Sintered densities higher than 95% of the theoretical one were thus obtained below 1500 ◦C. The bulk and additional blocking effects were characterized by impedance spectroscopy in wet atmosphere between 150 and 600 ◦C. A proton conduction behaviour was clearly identified. The blocking effect can be related to a space-charge depletion layer of protons in the vicinity of grain boundaries.

Domaines

Matériaux

Dates et versions

hal-00726499 , version 1 (30-08-2012)

Identifiants

Citer

Agnès Princivalle, Guilhem Martin, Céline Viazzi, Christian Guizard, Nicolas Grunbaum, et al.. Sintering and conductivity of BaCe0.9Y0.1O2.95 synthesized by the sol-gel method. Journal of Power Sources, 2011, 196 (22), pp.9238-9245. ⟨10.1016/j.jpowsour.2011.07.048⟩. ⟨hal-00726499⟩
100 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More