Open AccessВлияние влажности на электроперенос протонпроводящих перовскитов AZr-=SUB=-0.95-=/SUB=-Sc-=SUB=-0.05-=/SUB=-O-=SUB=-3-alpha-=/SUB=- (A=Ca, Sr, Ba) в окислительной атмосфере
Author(s) -
V. B. Balakireva,
В. П. Горелов,
Л. А. Дунюшкина,
Alexander Kuzmin
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.04.47406.266
Subject(s) - conductivity , grain boundary , humidity , analytical chemistry (journal) , hydronium , atmosphere (unit) , dielectric spectroscopy , electrical resistivity and conductivity , relative humidity , materials science , ion , chemistry , physics , thermodynamics , metallurgy , environmental chemistry , electrode , microstructure , organic chemistry , quantum mechanics , electrochemistry
The total, bulk, and grain boundary conductivities of proton-conducting zirconates of general formula AZr_0.95Sc_0.05O_3 – α (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°C) and impedance spectroscopy (30–800°C). The impact of humid atmosphere on the total, bulk, and grain boundary conductivities of the AZS system is studied at different humidity levels: $${{p}_\text{H}}}_{{\text{2}}}}{\text{O$$ = 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.