|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Powder and Ceramic Materials Science
||F-14: Determining the Processing Conditions for Fe Metal Exsolution and Phase-decomposition of Doped CaTiO3 for Catalysis Applications
||Jason Luong, Komal Syed, William Bowman
|On-Site Speaker (Planned)
Exsolution of transition metals from perovskite oxides has allowed the development of robust and durable oxide-supported metal catalysts without complex synthetic processes. By producing catalytically active nanoparticles that are partially submerged, or anchored, in the surface of the perovskite oxide supports, the exsolution mechanism has proven to be a viable strategy for stable catalyst synthesis. In the past, the perovskite CaTiO3 has been studied to understand its mixed ionic-electronic conductivity and exceptional structural integrity with high defect concentration. As a means to synthesize a composite material fully composed of highly abundant elements, Fe-doped CaTiO3 was selected and found experimentally to undergo a thermo-chemical process in a reducing environment to facilitate a phase-decomposition mechanism. In this work, to understand the microstructural changes during phase decomposition and exsolution, X-ray diffraction, scanning electron microscope, and energy dispersive spectrometry are used to observe the composition and phases at the micro and nanoscale.
||Ceramics, Characterization, Other