Abstract
In this work, the giant dielectric properties and dielectric relaxation behaviour in (Fe1/2Nb1/2)xTi1-xO2 (x = 0–0.1) ceramics prepared by a conventional solid state reaction method were investigated. Pure phase of rutile-TiO2 was obtained in all ceramic compositions. Dense ceramic microstructure without porosity was achieved in the sintered ceramics. High dielectric permittivity of > 103 was obtained. The existence of Ti4+ and Ti3+ was confirmed by X-ray photoelectron spectroscopy. The thermally activated dielectric relaxation behaviour in (Fe1/2Nb1/2)xTi1-xO2 ceramics was observed and attributed to the electron hopping mechanism.
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