Journal of Siberian Federal University. Chemistry / Thermal and Electrical Properties of Proton-Conducting Composite Ceramics Based on Al-doped Barium Indate

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2023 16 (3)
Authors
Kochetova, Nadezhda A.; Alyabysheva, Irina V.; Matveev, Egor S.; Animitsa, Irina E.
Contact information
Kochetova, Nadezhda A.: Institute of Natural Science and Mathematics Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg, Russian Federation; Alyabysheva, Irina V.: Institute of Natural Science and Mathematics Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg, Russian Federation; Matveev, Egor S.: Institute of Natural Science and Mathematics Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg, Russian Federation; ; Animitsa, Irina E.: Institute of Natural Science and Mathematics Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg, Russian Federation
Keywords
complex oxides; composite electrolytes; water uptake; oxygen-ion conductivity; proton conductivity
Abstract

Изучены свойства композиционного образца (1-x)Ba2In1.57Al0.43O5 ∙ xBa2InAlO5 (x=0.12). Установлено, что во влажной атмосфере при температурах ниже 800 °С композит обратимо взаимодействует с парами воды с образованием протонных дефектов в структурах составляющих его фаз. Процесс гидратации сопровождается значимым повышением общей электропроводности за счет появления вклада протонного переноса. Ниже температуры 500 °С во влажном воздухе образец является преимущественно протонным проводником. При обработке композиционной керамики выше температуры эвтектики системы Ba2In1.57Al0.43O5 – Ba2InAlO5 общая электропроводность повышается в сравнении с проводимостью исходных фаз; композиционный эффект связан с формированием особой микроструктуры образца

Properties of the (1-x)Ba2In1.57Al0.43O5 ∙ xBa2InAlO5 composite sample (x=0.12) were studied. The composite was found to demonstrate a reversible water uptake at temperatures below 800oC in wet atmosphere; it leads to proton defects formation in the structures of the phases included the composite. The hydration process is accompanied by a significant increase in the total electrical conductivity due to the appearance of a proton transfer contribution. The sample is predominantly a proton conductor at temperatures below 500 °С in wet air. When the composite ceramics treated above the eutectic temperature of the Ba2In1.57Al0.43O5 – Ba2InAlO5 system, the total electrical conductivity increases compared to the conductivity of the initial phases; composite effect is related to formation of a special microstructure of the sample

Pages
383–392
EDN
PXYGTV
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/151715