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Sinha, Abhinav
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article
Investigation of BiFeO3 modified PbTiO3-Bi(MgZr)O3-based complex perovskite ceramics
Abstract
Bismuth containing crystalline solutions of (1 - x)Bi(MgZr)0.5O3-xPbTiO3 (BMZ-PT) and [(BiFeO3)y - (BiMg0.5Zr0.5)1-y]x - [PbTiO3]1-x (BMZ-BF-PT) have been developed using conventional ceramic technology. X-ray diffraction analysis reveals that both the systems possess a perovskite structure, in which tetragonal to rhombohedral phase transformation appears for x = 0.55 in BMZ-PT and y = 0.20 in BMZ-BF-PT systems. SEM photographs reveal a uniform grain size distribution in the solid solution matrix with the presence of ferroelectric domains in few of the compositions. Ferroelectric hysteresis (polarization-electric field, P-E) loops reveal that increase in BiFeO3 in BMZ-PT systems results in a decrease in residual polarization of the system with change and distortion in the shape of the (P-E) loops. © 2008 Elsevier Ltd. All rights reserved.