Dielectric and Pyroelectric Properties of Dy-doped BSCT Thick Films by Screen-printing Method

Abstract

(Ba0.57Sr0.33Ca0.10)TiO3(=BSCT) powders, prepared by the sol-gel method, were doped using MnCO3 as the acceptor an Dy2O3 as the donor This powder was mixed with all organic vehicle BSCT thick films were fabricated by the screen-printing techniques on the alumina substrate. The structural and dielectric properties of BSCT thick films were investigated with variation of the Dy2O3 amount As a result of the differential thermal analysis (DTA), the exothermic peak was observed at around 670 degrees C due to the formation of the polycrystalline perovskite phase. All the BSCT thick films showed the XRD patterns of a typical polycrystalline perovskite structure. The average grain size of BSCT thick films decreased with all increasing amount of Dy2O3. The relative dielectric constant and dielectric loss of the BSCT thick film doped Dy2O3 0.1 mol% were 4637.4 and 1.6% at 1 kHz, respectively.