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Temperature dependence of the intrinsic and extrinsic contributions in BiFeO3- (K0.5Bi0.5)TiO3-PbTiO3 piezoelectric ceramics

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TABLE I. Summary of electrical properties and Rayleigh parameters atroom temperature for BF-KBT-PT, La-BFPT,7 and PZT45,46 ceramics, thed33 values were measured using a Berlincourt meter, the EC was taken fromx-E data at 7 kV/mm.
FIG. 3. Room temperature values of the (a) dinit, (b) Rayleigh coefficient,ad, and (c) extrinsic contributions as a function of the tetragonal distortion.The lines are drawn as a guide for the eye.
FIG. 4. (a)–(e) the Rayleigh coeffi-cient, ad, and the dinit and (f)–(j).
FIG. 6. The measured dinit, calculated dinit values, and the reversible extrin-sic component as a function of temperature for composition C

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