Ceramic and Transport Characteristics of Electrolytes Based on Mg-Doped LaYO3


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Abstract

Effect of magnesium on the sinterability, phase composition, microstructure, and transport properties of proton-conducting materials of composition LaY1–xMgxO3–δ (х = 0, 0.05, 0.1) was studied. Ceramic samples were obtained by using the citrate-nitrate synthesis method at various sintering temperatures (1250–1400°C). It was shown that, for the samples with x = 0.05 and 0.1, the relative density was no less than 95% at a sintering temperature of 1350°C, whereas undoped lanthanum nitrate has this density at 1450°C. An X-ray diffraction analysis and scanning electron microscopy demonstrated that introduction of a small amount of magnesium (x = 0.05) is sufficient for forming the single-phase and high-dense ceramics. Electrical conductivity data show that the LaY0.95Mg0.05O3–δ sample has high overall and ionic conductivities.

About the authors

A. V. Kas’yanova

Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University named after the first president of Russia B.N. Yeltsin

Email: yulia.lyagaeva@ya.ru
Russian Federation, Yekaterinburg, 620137; Yekaterinburg, 620075

Yu. G. Lyagaeva

Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University named after the first president of Russia B.N. Yeltsin

Author for correspondence.
Email: yulia.lyagaeva@ya.ru
Russian Federation, Yekaterinburg, 620137; Yekaterinburg, 620075

N. A. Danilov

Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University named after the first president of Russia B.N. Yeltsin

Email: yulia.lyagaeva@ya.ru
Russian Federation, Yekaterinburg, 620137; Yekaterinburg, 620075

S. V. Plaksin

Institute of High-Temperature Electrochemistry, Ural Branch

Email: yulia.lyagaeva@ya.ru
Russian Federation, Yekaterinburg, 620137

A. S. Farlenkov

Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University named after the first president of Russia B.N. Yeltsin

Email: yulia.lyagaeva@ya.ru
Russian Federation, Yekaterinburg, 620137; Yekaterinburg, 620075

D. A. Medvedev

Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University named after the first president of Russia B.N. Yeltsin

Email: yulia.lyagaeva@ya.ru
Russian Federation, Yekaterinburg, 620137; Yekaterinburg, 620075

A. K. Demin

Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University named after the first president of Russia B.N. Yeltsin

Email: yulia.lyagaeva@ya.ru
Russian Federation, Yekaterinburg, 620137; Yekaterinburg, 620075

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