Electrical conductivity of nanostructured fluorite-like Sc4Ti3O12 |
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| Authors: | L. P. Lyashenko L. G. Shcherbakova D. A. Belov A. V. Knotko |
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| Affiliation: | (1) Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia;(2) Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, 119991, Russia;(3) Faculty of Chemistry, Moscow State University, Moscow, 119899, Russia |
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| Abstract: | Single-crystal and polycrystalline samples of Sc4Ti3O12 have been shown to contain nanodomains (10–50 nm) with different degrees of ordering, coherent with the fluorite-like matrix. The oxygen-ion conductivity of this compound has been determined in the range 300–1000°C in air using impedance spectroscopy. The nanostructured single-crystal and polycrystalline samples are close in the activation energy for bulk conduction at both low and high temperatures: ?1.26 and 1.29 eV in the range 300–775°C, ?1.98 and 2.07 eV in the range 775–1000°C. |
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