Effect of Sintering Temperature on Structural and Dielectric Properties of (Ba0.54Sr0.36Ca0.10)TiO3 Thick Films

Abstract

Barium strontium calcium titanate powders were prepared with the sol-gel method. Ferroelectric (Ba0.54Sr0.36Ca0.1)TiO3(BSCT) thick films were fabricated by the screen-printing method on alumina substrate. Then we investigated the structural and dielectric properties of the BSCT thick films at different sintering temperatures. The thermal analysis showed that the BSCT polycrystalline perovskite phase formed at around 660 oC. The X-ray diffraction analysis showed a cubic perovskite structure with no second phase present in all of the BSCT thick films. The average grain size and the thickness of the specimens sintered at 1450 °C were about 1.6 m and 45 m, respectively. The relative dielectric constant increased and the dielectric loss decreased as the sintering temperature was increased; for BSCT thick films sintered at 1450 oC the values of the dielectric constant and the dielectric loss were 5641 and 0.4 %, respectively, at 1 kHz.