High-temperature electrical conductivity of the xNBT-(1-x)LMT ceramics: verification of Meyer-Neldel rule

abstract

Electrical conductivity behaviour of x(Na0.5Bi0.5)TiO3-(1-x)La(Mg0.5Ti0.5)O-3 ceramics with x ranging from 0.95 to 0.8 was analysed in the temperature range from 300 K to 800 K at microwaves (1 MHz - 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.

subject category

Engineering; Physics

authors

Rudys, S; Ivanov, M; Grigalaitis, R; Glemza, K; Banys, J; Rubanik, VV; Shilin, AD; Salak, AN

our authors

acknowledgements

This work was partly supported by project TUMOCS. This project has received funding from European Union's Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement No. 645660.

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