V. B. Balakireva, V. P. Gorelov, L. A. Dunyushkina, A. V. Kuz'min, “Impact of humidity on charge transport in proton-conducting perovskites $A$Zr$_{0.95}$Sc$_{0.05}$O$_{3-\alpha}$ ($A$ = Ca, Sr, Ba) exposed to an oxidative atmosphere”, Fizika Tverdogo Tela, 2019, Volume 61, Issue 4,Pages 645

This article is cited in 7 papers

Semiconductors

Impact of humidity on charge transport in proton-conducting perovskites $A$Zr$_{0.95}$Sc$_{0.05}$O$_{3-\alpha}$ ($A$ = Ca, Sr, Ba) exposed to an oxidative atmosphere

V. B. Balakireva^a, V. P. Gorelov^a, L. A. Dunyushkina^a, A. V. Kuz'min^ab

^a Institute of High-Temperature Electrochemistry, RAS
^b Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg

Abstract: The total, bulk, and grain boundary conductivities of proton-conducting zirconates of general formula $A$Zr$_{0.95}$Sc$_{0.05}$O$_{3-\alpha}$ (AZS), where $A$ = Ca, Sr, Ba, are measured in air with different humidity levels. The conductivity is measured using the four-probe dc method (600–900$^{\circ}$C) and impedance spectroscopy (30–800$^{\circ}$C). The impact of humid atmosphere on the total, bulk, and grain boundary conductivities of the AZS system is studied at different humidity levels: (рН$_{2}$О = 0.04, 0.61, and 2.5 kPa. Humidity is found to have a considerable effect on the conductivity of our CaZS and BaZS at lower temperatures, suggesting the likelihood of hydronium ion-mediated transport.

Received: 25.10.2018
Revised: 07.11.2018
Accepted: 07.11.2018

DOI: 10.21883/FTT.2019.04.47406.266