Impedance Spectroscopy Study of the Electrical Properties of Cation-Substituted Barium Hexaaluminate Ceramics

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1134/S1063783418020063

Аннотация: We report on the behavior of frequency and temperature dependences of the impedance of a measuring cell in the form of a parallel-plate capacitor filled with barium hexaaluminate ceramics with four aluminum cations replaced by iron (BaO center dot 2Fe(2)O(3) center dot 4Al(2)O(3)). The measurements have been performed in the frequency range of 0.5-10(8) Hz at temperatures of 20-375A degrees C. A technique for determining the electrical properties of the investigated ceramics is proposed, which is based on an equivalent electric circuit allowing the recorded impedance spectra to be approximated with sufficiently high accuracy. The established spectral features are indicative of the presence of two electric relaxation times different from each other by three orders of magnitude. This fact is explained by the difference between the charge transport processes in the bulk of crystallites and thin intercrystallite spacers, for which the charge activation energies have been determined.

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Издание

Журнал: PHYSICS OF THE SOLID STATE

Выпуск журнала: Vol. 60, Is. 2

Номера страниц: 274-280

ISSN журнала: 10637834

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Belyaev B.A. (Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC SB RAS, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Drokin N.A. (Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC SB RAS, Krasnoyarsk 660036, Russia; Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia)
  • Poluboyarov V.A. (Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Krasnoyarsk 660036, Russia)

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