Abstract

The ferroelectric ceramics of solid solutions xSr(Li1/4Nb3/4)O3-(1-x)PbTiO3 (0.05≤x≤0.40) were fabricated by conventional solid state sintering. The dielectric constants, Curie temperature, electromechanical coupling factors, and linear thermal expansion were measured as a function of x. The piezoelectric constants, elastic compliance constants, and Poisson's ratio of the specimens were calculated from the measured piezoelectric properties. Maximum coupling factors k31 and k33, and maximum piezoelectric constants d31 and d33 were obtained for the composition x=0.30, which is located close to the phase boundary between the ferroelectric tetragonal and the paraelectric cubic phases.

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