Crystal Structure and Proton Conductivity of BaZr0.9Sc0.1O3−δ.
- Resource Type
- Article
- Authors
- Ahmed, Istaq; Karlsson, Maths; Eriksson, Sten-Gunnar; Ahlberg, Elisabet; Knee, Christopher S.; Larsson, Kristian; Azad, Abul K.; Matic, Aleksandar; Börjesson, Lars
- Source
- Journal of the American Ceramic Society. Sep2008, Vol. 91 Issue 9, p3039-3044. 6p. 1 Chart, 9 Graphs.
- Subject
- *PEROVSKITE
*SINTERING
*RIETVELD refinement
*NEUTRON diffraction
*HYDRATION
*ELECTROLYTES
- Language
- ISSN
- 0002-7820
Solid-state sintering has been used to prepare the perovskite BaZr0.9Sc0.1O3−δ. Analysis of X-ray powder diffraction data shows that an increase of the unit cell parameter, a, was observed after deuteration. Rietveld analysis of room-temperature neutron powder diffraction data confirmed cubic symmetry (space group Pm-3 m). Dynamic thermogravimetric analysis indicates that the hydration process occurs below 335°C and approximately 58% of the theoretical number of protonic defects can be filled. The presence of protons/deutrons is seen from the strong O–H/O–D stretch band in the infrared spectrum of the hydrated/deuterated samples. The proton conductivity of a prehydrated sample was investigated under dry and wet Ar atmospheres. [ABSTRACT FROM AUTHOR]