Ionic conductivity of double vanadate Ag3Sc2(VO4)3

Autor:	O. I. Solov’ev, L. N. Komissarova, N. I. Sorokin
Rok vydání:	2014
Předmět:	Chemistry Inorganic chemistry Enthalpy Electrochemistry Fast ion conductor Analytical chemistry Ionic conductivity Vanadate Atmospheric temperature range Conductivity Dielectric spectroscopy Ion
Zdroj:	Russian Journal of Electrochemistry. 50:395-397
ISSN:	1608-3342 1023-1935
DOI:	10.1134/s1023193514040090
Popis:	Ionic conductivity of double vanadate Ag3Sc2(VO4)3 with the NASICON structure is studied by the method of impedance spectroscopy in the frequency range from 5 to 5 × 105 Hz and in the temperature range of 300–827 K. The vanadate Ag3Sc2(VO4)3 is prepared in the form of fine crystalline powder by solid-state synthesis from V2O5, Sc2O3, and AgNO3 at 1173 K. The conductivity of Ag3Sc2(VO4)3 ceramic samples σ = 8 × 10−3 S/cm (at 563 K). The σ vs. T curve demonstrates an anomaly at 563–623 K which corresponds to thermal effects in this temperature range. The values of enthalpy of ion transport activation are ΔH = 0.40 ± 0.05 eV (T 623 K). The ionic conductivity of Ag3Sc2(VO4)3 is due to Ag+ ions localized in channels of the framework structure of the NASICON type.
Databáze:	OpenAIRE
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