title: Characterization of 3D interconnected microstructural network in mixed ionic and electronic conducting ceramic composites.
abstract: The microstructure and connectivity of the ionic and electronic conductive phases in composite ceramic membranes are directly related to device performance. Transmission electron microscopy (TEM) including chemical mapping combined with X-ray nanotomography (XNT) have been used to characterize the composition and 3-D microstructure of a MIEC composite model system consisting of a Ce0.8Gd0.2O2 (GDC) oxygen ion conductive phase and a CoFe2O4 (CFO) electronic conductive phase. The microstructural data is discussed, including the composition and distribution of an emergent phase which takes the form of isolated and distinct regions. Performance implications are considered with regards to the design of new material systems which evolve under non-equilibrium operating conditions.
authors.affiliation: HeteroFoaM Center, a DOE Energy Frontier Research Center, USA. wchiu@engr.uconn.edu.
authors.forename: William M
authors.initials: WM
authors.lastname: Harris
authors.forename: Kyle S
authors.initials: KS
authors.lastname: Brinkman
authors.forename: Ye
authors.initials: Y
authors.lastname: Lin
authors.forename: Dong
authors.initials: D
authors.lastname: Su
authors.forename: Alex P
authors.initials: AP
authors.lastname: Cocco
authors.forename: Arata
authors.initials: A
authors.lastname: Nakajo
authors.forename: Matthew B
authors.initials: MB
authors.lastname: DeGostin
authors.forename: Yu-chen Karen
authors.initials: YC
authors.lastname: Chen-Wiegart
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Fanglin
authors.initials: F
authors.lastname: Chen
authors.forename: Yong S
authors.initials: YS
authors.lastname: Chu
authors.forename: Wilson K S
authors.initials: WK
authors.lastname: Chiu