Aerosol Deposition of (Cu,Ti) substituted Bismuth Vanadate Films

Titelangaben

Exner, Jörg ; Fuierer, Paul ; Moos, Ralf:
Aerosol Deposition of (Cu,Ti) substituted Bismuth Vanadate Films.
In: Thin Solid Films. Bd. 573 (2014) . - S. 185-190.
ISSN 0040-6090
DOI: https://doi.org/10.1016/j.tsf.2014.11.037

Volltext

Link zum Volltext (externe URL):

Angaben zu Projekten

Abstract

Bismuth vanadate, Bi4V2O11, and related compounds with various metal (Me) substitutions, Bi4(MexV1−x)2O11−δ, show some of the highest ionic conductivities among the known solid oxide electrolytes. Films of Cu and Ti substituted bismuth vanadate were prepared by an aerosol deposition method, a spray coating process also described as room temperature impact consolidation. Resultant films, several microns in thickness, were dense with good adhesion to the substrate. Scanning electron microscopy and high temperature X-ray diffraction were used to monitor the effects of temperature on the structure and microstructure of the film. The particle size remained nano-scale while microstrain decreased rapidly up to 500 °C, above which coarsening and texturing increased rapidly. Impedance measurements of films deposited on inter-digital electrodes revealed an annealing effect on the ionic conductivity, with the conductivity exceeding that of a screen printed film, and approaching that of bulk ceramic.