Abstract
Temperature and stress induced electromechanical coupling studies were carried out for relaxor ferroelectric ceramics Ba(NdxTi(1-2x)Nbx)O3, Ba(NdyTi(1-2y)Nby)O3 and [Ba(Nd0.1Ti0.8Nb0.1)O3](1-z)[Na0.5Bi0.5TiO3]z. The thickness mode of electromechanical coupling and effective electromechanical coupling factors obtained from capacitance measurements were in the range 0.40–0.78 depending up on the compound, its composition and temperature. From modulus measurements the thickness and effective mode of electromechanical coupling factors obtained are in the range 0.9960–0.9998 depending up on the composition z.
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