Abstract
Lead-free compound <TEX>$(Na_{0.5}Bi_{0.5})(Zr_{0.75}Ti_{0.25})O_3$</TEX> was prepared using conventional ceramic technique at <TEX>$1070^{\circ}C$</TEX>/4h in air atmosphere. X-ray diffraction analysis showed the formation of single-phase orthorhombic structure. Permittivity data showed low temperature coefficient of capacitance (<TEX>$T_{CC}{\approx}5%$</TEX>) up to <TEX>$100^{\circ}C$</TEX>. Complex impedance studies indicated the presence of grain boundary effect, non-Debye type dielectric relaxation and evidences of a negative temperature coefficient of resistance. The ac conductivity data were used to evaluate the density of states at Fermi level and apparent activation energy of the compound.
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