Understanding the rapid reoxidation process and the electrical properties of Spark Plasma sintered pyrochlores - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the European Ceramic Society Année : 2024

Understanding the rapid reoxidation process and the electrical properties of Spark Plasma sintered pyrochlores

Résumé

Pyrochlore structures with composition Pr2−xSmxZr2O7 (x = 0, 1, and 2) were synthetized and studied. Spark Plasma Sintering (SPS) was employed to produce ceramics with over 95% of relative density. The reoxidation behavior and the influence of the sintering process on the electrical properties were studied by Electrochemical Impedance Spectroscopy. The overall conductivity of the materials is higher for the samples with Pr, while the introduction of Sm induced an additional electrical contribution. The reoxidation of the samples presented fast kinetics and increased conductivity, particularly in the PrSmZr2O7 (PSZO) sample. PSZO also exhibits a total conductivity comparable to that of the reference materials used as ionically conductive solid electrolytes. The prepared ceramics, especially the PSZO sample, demonstrate excellent relative density, good conductivity, and fast oxidation, holding promise for applications such as Solid Oxide Fuel Cells, gas sensors, and clean energy technologies that require thermal and physical stability, as well as rapid oxidation-reduction processes.

Domaines

Matériaux
Fichier sous embargo
Fichier sous embargo
0 1 6
Année Mois Jours
Avant la publication
vendredi 21 juin 2024
Fichier sous embargo
vendredi 21 juin 2024
Connectez-vous pour demander l'accès au fichier

Dates et versions

hal-04432472 , version 1 (01-02-2024)

Identifiants

Citer

Emerson Luiz dos Santos Veiga, Héctor Beltrán-Mir, Héctor Beltrán-Mir, Sébastien Fourcade, U-Chan Chung, et al.. Understanding the rapid reoxidation process and the electrical properties of Spark Plasma sintered pyrochlores. Journal of the European Ceramic Society, 2024, 44 (6), pp.4130-4140. ⟨10.1016/j.jeurceramsoc.2023.12.070⟩. ⟨hal-04432472⟩
26 Consultations
1 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More