XRD Study on D-Values of Modified PbTiO3 Ceramics during Poling Process

Yuan Wei Zhang; X.G. Tang; A.X. Kuang; H.L.W. Chan

doi:10.4028/www.scientific.net/AMR.177.37

Paper Titles

Determination of Particle Size Distribution of Nano-TiO₂ Coating Film by AFM and Image Analysis
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Application of Raman Spectroscopy on Size Driven Phase Transition in Bismuth Titanate
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Mechanochemical Synthesis and Characteristics of Pb(Mg_1/3Nb_2/3)O₃
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ZnFe₂O₄ Modified by Fe(NO₃)₃ for the Synthesis of Ionic Ferrofluids
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XRD Study on D-Values of Modified PbTiO₃ Ceramics during Poling Process
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Application of X-Ray Diffraction at the Study on the Preparation and Structure of α-Al₂O₃ Nanocrystal
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Effect of the Acidity on the Morphology and Composition of Nano-TiO₂/ Cu Particles
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Effect of Severe Plastic Deformation on Microstructures and Properties of AgCuO Composites
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Sol-Gel Preparation, Characterization and Photocatalytic Activity of Co Doped Nano-TiO₂
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XRD Study on D-Values of Modified PbTiO₃ Ceramics during Poling Process

Abstract:

The Calcium modified PbTiO3 ceramics with large piezoelectric anisotropy was poled in consecutive steps. X-ray diffraction (XRD) found that the values of inter-planar spacing, d002 and d200, increased with poling field at initial poling stages. A noticeable drop of the d¬002 and d200 at the coercive field was observed. The residual stresses measured by the  angle tilt method were introduced. The relations of d002-sin2ψ and d¬¬200-sin2ψ at different poling stages were simulated by a mathematic model. The linear terms in the model are related to the macro-stress which may cause an elastic deformation; the exponential term in the model is related to the micro-stress which may cause a plastic deformation by the 90o domain switch. The results show that macro-stress and micro-stress decreased and the decay speed along  angle increased as to the d002 lattice spacing. The residual stresses related to the d200 lattice spacing were almost not changed.