Title :
Oxygen ionic transport in brownmillerite-type Ca2Fe2O5±δ and calcium ferrite-based composites
Author :
Shaula, A.L. ; Kolotygin, V.A. ; Naumovich, E.N. ; Waerenborgh, J.C. ; Pivak, Y.V. ; Kharton, V.V.
Author_Institution :
Department of Materials & Ceramic Engineering, CICECO, University of Aveiro, Portugal
Abstract :
The present work was centered on the studies of oxygen permeability, mixed conductivity, dilatometric behavior, crystal structure and microstructure of Ca2Fe2O5±δ and Ca2(Fe,M)2O5±δ (M = Co, Mn) solid solutions, and dual-phase Ca2Fe2O5 - Ce0.9Gd0.1O1.95 composites. The anisotropic oxygen-ion diffusion in calcium ferrite lattice was simulated using molecular dynamics and atomistic modeling techniques. The computer simulations results were analyzed in light of the experimental data on ionic conduction and thermodynamic stability.
Keywords :
Ceramics; Conductivity; Ferrites; Iron; Solids; Stability analysis; Thermal stability; brownmillerite; computer simulations; dimensional stability; oxide-ion diffusion; oxygen permeation;
Conference_Titel :
Oxide Materials for Electronic Engineering (OMEE), 2012 IEEE International Conference on
Conference_Location :
Lviv, Ukraine
Print_ISBN :
978-1-4673-4491-3
DOI :
10.1109/OMEE.2012.6464764
