Structural, thermal and dielectric properties of ferroelectric Pb_1-xCa_xTiO₃ ceramics
by Praniti Dave; Shiv Kumar Barbar; M. Roy
International Journal of Nanoparticles (IJNP), Vol. 5, No. 2, 2012

Abstract: Perovskite (ABO₃) type ferroelectric materials are most promising materials for multifunctional ferroelectric and other electronic devices. Lead titanate (PbTiO₃) ferroelectric ceramic is one of them. It is a very good ferroelectric material but the drawback of this material is that it is highly brittle due to very high tetragonal distortion and hence creates problems during device fabrication. To remove this drawback different types of substitution on A and B-cation site makes this material suitable for different devices. We have prepared Ca-doped PbTiO₃ of general formula Pb_1-xCa_xTiO₃ with x = 0.00, 0.1 and 0.3. The polycrystalline ceramic samples of these materials have been prepared by standard solid state reaction method using high purity oxides and carbonates. The formation of compounds has been checked by X-ray diffraction followed by scanning electron microscopy (SEM) and particle size analysis. Phase transition in these compounds has been studied using dielectric and thermal analysis (DSC) technique. It has been observed that the phase transition temperature decreases with the increase of substitution concentration. The results are discussed in detail.

Online publication date: Wed, 20-Aug-2014

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