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Title of Journal: Bull Mater Sci

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Abbravation: Bulletin of Materials Science

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Springer-Verlag

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0973-7669

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Temperature dependence of electromechanical proper

Authors: A K Shukla V K Agrawal I M L Das Janardan Singh S L Srivastava
Publish Date: 2010/11/20
Volume: 33, Issue: 4, Pages: 383-390
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Abstract

The compositions of lead lanthanum zirconate titanate PLZT PbZr057Ti043O3 + x at of La where x = 3 5 6 10 and 12 have been synthesized using mixed oxide route The temperature dependent electromechanical parameters have been determined using vector impedance spectroscopy VIS The charge constant d 31 and elastic compliance s 11 E show a peak in all the samples at a temperature T mt much below the ferroelectric — paraelectric transition temperature whereas the series resonance frequency f s shows a dip at these temperatures The Poisson’s ratio σ E increases with temperature T showing a broad peak at a temperature higher than T mt The voltage constant g 31 decreases and the planar coupling coefficient K p remains constant up to half of the T mt and then falls sharply with T Half of the T mt can therefore be used for specifying the working temperature limit of the piezoceramics for the device applications

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