Abstract
Barium strontium titanate (Ba0.85Sr0.15TiO3, BST) ceramic has been prepared by conventional solid –state reaction in air at 1200°C, followed by slow cooling to room temperature at the end of the reaction. The X-ray diffraction (XRD) studies show that these ceramic are belongs to tetragonal phase structure with space group P4mm. The electrical properties of the ceramic shows maximum dielectric constant was about εr = 1094.52 of this sample has resulted at the Curie temperature, TC = 80°C measured at a frequency of 1 kHz. The capacitance of the sample described the dielectric behavior was associated with bulk ferroelectric (C = 10−9 to 10−10 F). Besides, Ba0.85Sr0.15TiO3ceramic has conductivity in the range between semi – insulator and insulator material and the samples shows small PTCR effect above the Tc.
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