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Influence of microstructure on electrical properties in BaZr0.5In0.5O3-delta proton conductor

Istaq Ahmed (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Sten G. Eriksson (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Elisabet Ahlberg ; Christopher S Knee
SOLID STATE IONICS (0167-2738 ). Vol. 179 (2008), 21-26, p. 1155-1160.
[Artikel, refereegranskad vetenskaplig]

Two different preparative routes, one a wet chemical route (WCR) and the other a traditional solid state sintering route (SSR), have been used to synthesise the oxygen deficient perovskite BaZr0.5In0.5O3-delta. Analysis of X-ray powder diffraction data showed that both phases adopt cubic crystal structures. Environmental scanning electron microscope (ESEM) images showed that a smaller grain size was obtained for the WCR sample. Dynamic then-no-gravimetric analysis indicated significant mass losses for hydrated samples compared to their respective dried samples. Proton conductivity was investigated for hydrated and as-prepared phases under dry and wet atmospheres, respectively. The hydrated sample prepared via the solid state sintering route displayed a higher proton conductivity under dry conditions, reflecting the presence of fewer grain boundaries in this sample. (c) 2008 Elsevier B.V. All rights reserved

Nyckelord: X-ray diffraction; ESEM; proton conductor; perovskite; grain boundaries


stene@chalmers.se



Denna post skapades 2009-05-05. Senast ändrad 2010-03-16.
CPL Pubid: 93487

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)
Institutionen för kemi (2001-2011)

Ämnesområden

Kemi

Chalmers infrastruktur