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Title: High-temperature electrical conductivity of the xNBT–(1-x)LMT ceramics: verification of Meyer-Neldel rule
Author: Rudys, Saulius
Ivanov, Maksim
Grigalaitis, Robertas
Glemza, Kazimieras
Banys, Juras
Rubanik, Vasili V.
Shilin, Aleksandr D.
Salak, Andrei N.
Keywords: Electrical conductivity
Dielectric spectroscopy
Activation energy
Meyer-Neldel rule
Issue Date: 12-Feb-2019
Publisher: Taylor & Francis
Abstract: Electrical conductivity behaviour of x(Na0.5Bi0.5)TiO3-(1-x)La(Mg0.5Ti0.5)O3 ceramics with x ranging from 0.95 to 0.8 was analysed in the temperature range from 300 K to 800 K at microwaves (1MHz – 1GHz frequency region). Analysis of calculated DC conductivity parameters has shown that the activation energy changes at about 690 K which could be associated with the phase change in these materials. The logarithm of preexponential factor of DC conductivity changes linearly according to the activation energy, i.e. it follows Meyer-Neldel rule both below and above the phase transition point.
Peer review: yes
DOI: 10.1080/10584587.2019.1591986
ISSN: 1058-4587
Appears in Collections:CICECO - Artigos

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