Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials
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Electric conductivity at room temperature in Li0,12Na0,88Ta0,25Nb0,75O3 synthesized at a high pressure

V.V. Efremov, O.B. Shcherbina, M.N. Palatnikov

Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences», Apatity, Russia

DOI: 10.26456/pcascnn/2020.12.061

Original article

Abstract: A ferroelectric solid solution Li0,12Na0,88Ta0,25Nb0,75O3 with a perovskite structure, synthesized under the high pressure and temperature conditions, has been studied by impedance spectroscopy in the temperature range 290-460 K. The values ​​of static conductivity, the most probable relaxation times as functions of temperature, the activation enthalpy of charge carriers, and the real part of the dielectric constant have been determined. It was found that at room temperature Li0,12Na0,88Ta0,25Nb0,75O3 has a high electrical conductivity, close to the superionic one. Possible mechanisms of the discovered phenomenon are discussed.

Keywords: solid solutions, thermobaric synthesis, impedance spectroscopy, electric conductivity, charge carriers activation enthalpy

  • Vadim V. Efremov – Ph. D., Senior Researcher of Materials of Electronic Engineering Laboratory, Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences», Apatity, Russia
  • Olga B. Shcherbina – Ph. D., Senior Researcher of Materials of Electronic Engineering Laboratory, Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences», Apatity, Russia
  • Mikhail N. Palatnikov – Dr. Sc., Acting as Chief Researcher and as Head of Materials of Electronic Engineering Laboratory, Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences», Apatity, Russia

Reference:

Efremov, V.V. Electric conductivity at room temperature in Li0,12Na0,88Ta0,25Nb0,75O3 synthesized at a high pressure / V.V. Efremov, O.B. Shcherbina, M.N. Palatnikov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2020. — I. 12. — P. 61-72. DOI: 10.26456/pcascnn/2020.12.061. (In Russian).

Full article (in Russian): download PDF file

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