Abstract
The data obtained by impedance spectroscopy (1 Hz to 32 MHz) and broad-band dielectric spectroscopy (30 GHz-150 THz) are presented for crystals based on zirconia doped by 1.5–30 mol % Y2O3 or 10 mol % Sc2O3 and 1 mol % Y2O3. The maximum of ionic conductivity is confirmed for the latter composition in the working temperature range of solid oxide fuel cells where the doping by scandium and yttrium oxides makes it possible to obtain isotropic single crystals. Dependences of dielectric permeability and high-frequency conductivity of materials on the composition of crystals and temperature are presented.
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Original Russian Text © V.G. Artemov, I.E. Kuritsyna, S.P. Lebedev, G.A. Komandin, P.O. Kapralov, I.E. Spektor, V.V. Kharton, S.I. Bredikhin, A.A. Volkov, 2014, published in Elektrokhimiya, 2014, Vol. 50, No. 7, pp. 768–772.
This publication was prepared based on a lecture delivered at the All-Russian Conference with international participation “Fuel Cells and Power Plants,” Chernogolovka, 2013.
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Artemov, V.G., Kuritsyna, I.E., Lebedev, S.P. et al. Analysis of electric properties of ZrO2-Y2O3 single crystals using teraherz IR and impedance spectroscopy techniques. Russ J Electrochem 50, 690–693 (2014). https://doi.org/10.1134/S1023193514070039
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DOI: https://doi.org/10.1134/S1023193514070039