Analysis of electric properties of ZrO2-Y2O3 single crystals using teraherz IR and impedance spectroscopy techniques


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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Artemov, VG; Kuritsyna, IE; Lebedev, SP; Komandin, GA; Kapralov, PO; Spektor, IE; Kharton, VV; Bredikhin, SI; Volkov, AA

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The work was financially supported by the Ministry of Education and Science of the Russian Federation (Agreements Nos. 8188, 8374, and 14.V25.31.0018).

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