Mixed Ionic-Electronic Conducting Perovskites as Nanostructured Ferroelastics

Room Temperature Ferroelastic Creep Behavior of Porous (La0.6Sr0.4)0.95Co0.2Fe0.8O3-δ

“…It is generally accepted that most polycrystalline LaCoO 3 -based perovskites possess a cubic symmetry during high-temperature processing and this cubic structure transforms to low symmetry phases such as rhombohedral upon cooling [4]. The low symmetry of the transformed phase leads to the formation of twins in alternating patterns to release stresses related with transformation strains [5,6]. The non-linear behavior along with hysteresis in the stress-strain curve of materials with reduced symmetry below Curie temperature when external forces are applied is known as ferroelastic behavior [7][8][9].…”

Lead and tungsten double stabilizing cobalt‐based perovskite oxygen permeation membranes for clean energy delivery

“…Unfortunately, it still lacks some details regarding CO 2 resistance and the state of cobalt ions with B site stabilizing cations in the open literature. Recently, tungsten was applied into B site to stabilize the cobalt ion . With the help of tough tungsten, SrCo 1−x W x O 3−δ and Ba 0.5 Sr 0.5 Co 0.8 Fe 0.1 W 0.1 O 3−δ with highly stable cubic perovskite structure have been successfully developed.…”

“…Recently, tungsten was applied into B site to stabilize the cobalt ion. [31][32][33][34][35] With the help of tough tungsten, SrCo 1−x W x O 3−δ and Ba 0.5 Sr 0.5 Co 0.8 Fe 0.1 W 0.1 O 3−δ with highly stable cubic perovskite structure have been successfully developed. Although the stable long-term oxygen fluxes through these tungsten stabilizing membranes under the air atmosphere have been observed, it still requires the information under the reducing environment and CO 2 atmosphere to justify their further practical applications.…”