Abstract
Abstract Dielectric, piezoelectric and pyroelectric properties of the (1–x)Pb(1–y) Sry(Mg1/3Nb2/3)O3-xPbTiO3 solid solution near the morphotropic phase boundary (PMN-PT) have been investigated. Dielectric constant and loss of poled ceramic samples were determined. The electromechanical coupling factor and piezoelectric d33 constant were measured for various compositions in the system. The pyroelectric coefficient and spontaneous polarization were measured by the static Byer-Roundy method as a function of temperature. The addition of SrCO3 affects the dielectric and pyroelectric properties of PMN-PT and transition temperature is continuously shifted to lower temperature with increase of a small amount of SrCO3. The composition with the maximum piezoelectric constant exhibits the high dielectric and pyroelectric constant.
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