Eutectoid decompositions in Ce‐containing ABO₃ perovskites: Part I, the case of cooperative growth in CeAlO₃

Abstract

Oxidation of perovskite CeAlO₃ results in the eutectoid transformation to CeO₂ and Al₂O₃. This phase transformation was recorded using thermal gravimetric analysis, X‐ray diffraction, and scanning transmission electron microscopy. Lamellar features in the resultant microstructure indicate cooperative growth. Processing conditions dictate the lamellae sizes, which can be as small as a few nanometers, and coarsen into large domains with additional high temperature annealing.