Theoretical Investigation of Electromechanical Properties of BaTiO₃ Crystal

Abstract

The piezoelectric coefficients d₃₃ and d₃₁, the free dielectric constant ε₃₃ and the electrostrictive constants Q₃₃ and Q₃₁ in both ferro- and para-electric phases of BaTiO₃ crystal are calculated on the basis of the point dipole model. The calculated results are shown as a function of the effective charge of the Ti ions, which corresponds to temperature. The results obtained are discussed in comparison with the experimental data.