Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
La28−xW4+xO54+3x/2 Powders Prepared by Spray Pyrolysis
Ist Teil von
Journal of the American Ceramic Society, 2012-11, Vol.95 (11), p.3403-3407
Ort / Verlag
Blackwell Publishing Ltd
Erscheinungsjahr
2012
Link zum Volltext
Quelle
Wiley Online Library Journals Frontfile Complete
Beschreibungen/Notizen
Here we report the first aqueous solution‐based synthesis route to lanthanum tungstate nanopowders (La28−xW4+xO54+3x/2). Lanthanum tungstate‐based materials have high proton conductivity at elevated temperatures making them interesting for several energy technology applications. The La28−xW4+xO54+3x/2 powders prepared by developing a new aqueous precursor solution have a narrow particle size distribution with an average grain size of 100 nm. Different pre‐consolidation conditions were studied to enhance powder performance. Dense, single phase materials with homogeneous microstructures with grain size ~4 μm were obtained using sintering temperatures at 1400°C in air. Changing the La/W‐ratio from 5.6 to 5.4 did not affect the densification rate, however, a slight increase in grain growth rate was observed.