Abstract
ZnBO doped (Ba0.5Sr0.5)TiO3 (BST) ceramic was synthesized by conventional mixed oxide method. 5 wt % ZnBO addition to the BST has lowered the sintering temperature of BST from 1350 to 1100 °C. From the X-ray diffraction analysis, we found that the 5 wt % ZnBO doped BST has the perovskite structure, and any pryo phase was not observed. The dielectric properties and ac conductivity have been investigated at temperature range from 30 to 130 °C with various frequencies (1–100 kHz). The real part of relative dielectric permittivity εr' was decreased with increasing the temperature and the frequency. The activation energy for conduction process was calculated from the slope of ac conductivity at 1 kHz. The activation energy calculated through the Arrhenius law was 0.42 eV. In this paper, we will discuss the low-frequency dielectric relaxation and ac conductivity of 5 wt % ZnBO doped BST ceramics in relation to the electrical conduction.
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