Dielectric, pyroelectric and piezoelectric properties in the relaxor ferroelectric (1-x-y) Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-xPbTiO/sub 3/-yPbZrO/sub 3/ system

Dielectric, pyroelectric, and piezoelectric properties of relaxor ferroelectric in the (1-x-y) Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-xPbTiO/sub 3-y/PbZrO/sub 3/ solid solution series have been investigated. The dielectric constant and loss of poled ceramic samples were determined. The pyroelectric coefficient was measured by the static Byer-Roundy method as a function of temperature. The electromechanical coupling factor (K/sub p/) was measured by the resonance-antiresonance method. The addition of PbZrO/sub 3/ affects the dielectric and pyroelectric properties of PMN-PT, and the transition temperature is continuously shifted to lower temperature with a small increase of PbZrO/sub 3/. The composition with the maximum electromechanical coupling factor exhibits high dielectric and pyroelectric properties.<
>