Structural characteristics, sinterability and electrical conductivity of Ba-site non-stoichiometric Ba{sub x}Ce{sub 0.50}Zr{sub 0.40}Y{sub 0.10}O{sub 3-{delta}}
- School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China)
The influence of barium content on the structural characteristics, sinterability and electrical conductivity of proton conductor Ba{sub x}Ce{sub 0.50}Zr{sub 0.40}Y{sub 0.10}O{sub 3-{delta}} (x = 0.95, 0.97, 1.00, 1.03, 1.05) is investigated. Compositions with barium deficiency show the presence of fluorite precipitate detected by powder X-ray diffraction, whilst pure perovskite phase is present for other samples. Barium deficiency promotes the densification process of the samples. The electrical conductivity of Ba{sub x}Ce{sub 0.50}Zr{sub 0.40}Y{sub 0.10}O{sub 3-{delta}} increases with barium content, which is mainly ascribed to the decreased activation energy due to the increasing lattice volume, especially for the case in wet 5% H{sub 2}/Ar. The present results suggest that it is very important to control the stoichiometry of cations to obtain desirable perovskite type high temperature proton conductors.
- OSTI ID:
- 22202857
- Journal Information:
- Materials Research Bulletin, Vol. 45, Issue 11; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Local Structure of Ba1-xSrxTiO3 and BaTi1-yZryO3 Nanocrystals Probed by X-ray Absorption and X-ray Total Scattering
A neutron diffraction study of structural distortion and magnetic ordering in the cation-ordered perovskites Ba{sub 2}Nd{sub 1−x}Y{sub x}MoO{sub 6}