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 frequeПоказать полностьюncy 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.
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