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The design of lead-free ceramics with multifunctional properties, namely piezoelectric and energy storage, is a hot topic. Among these materials Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) and BaTi0.89Sn0.11O3 (BTSn) are considered as potential candidates...

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We investigate the relaxation and conduction mechanism of Ba0.90Sr0.10TiO3 (BST) ceramic, synthesized by the solid state reaction method. The dielectric and relaxation properties are analyzed in the temperature range of 380-450°C with alternative current in the frequency range of 20Hz-1MHz. Variation of dielectric constant, , with temperature shows a normal ferroelectric transition at Tc=95°C with a weak degree of diffuseness. The modified Cole-Cole equation is used to describe all contributions to the relaxation mechanism. The frequency exponent m(,T) deduced from experimental data of the dielectric loss () as * Corresponding author: Pr. Lahoucine Hajji