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Anelastic and dielectric relaxation measurements in the protonic conductor Ba3(Ca1.18Nb1.82)O9−δ

✍ Scribed by S Bausch; H.G Bohn; W Schilling

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
524 KB
Volume
97
Category
Article
ISSN
0167-2738

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✦ Synopsis

In order to study the local proton motion in complex perovskite-type protonic conductors anelastic and dielectric relaxation measurements have been carried out on the compound Ba (Ca Nb )O . Both techniques show spectra 3 1.18 1.82 92d depending on the proton concentration. From the dielectric measurements an activation energy of E 5 0.50 eV for the local a reorientation of a proton-related defect can be derived. The observed anelastic spectra support the assumption that the same type of defect gives rise to an anelastic relaxation peak. The concentration dependence and comparison with long-range conductivity data are discussed.

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