title: Modeling of the electrostrictive, dielectric, and piezoelectric properties of ceramic PbTiO(3).
abstract: The upper and lower limits of the electrostrictive constants, dielectric permittivities, spontaneous polarizations, and piezoelectric coefficients were calculated for ceramic PbTiO(3) from theoretical single-crystal constants. Experimental ceramic data fall between these upper and lower limits. The large piezoelectric anisotropy d(33)/d(31) of ceramic PbTiO(3 ) was shown to be related to the single-crystal PbTiO(3) electrostrictive anisotropies Q(11)/Q(12 ) and Q(44)/Q(12). The possibility of a change in sign of the ceramic d(31) coefficient due to a slight variation in the single-crystal electrostrictive anisotropies was discussed. The single-crystal and predicted ceramic hydrostatic electrostrictive constants were found to be equal. Using this result the ceramic hydrostatic g(h ) coefficient is always smaller than the single-crystal g (h), but the ceramic hydrostatic d(h) coefficient can be either larger or smaller than the single-crystal d(h) depending on the dielectric anisotropy (epsilon (11)/epsilon(33)) of the single-crystal.
authors.affiliation: Mater. Res. Lab., Pennsylvania State Univ., University Park, PA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Haun
authors.forename: E
authors.initials: E
authors.lastname: Furman
authors.forename: S J
authors.initials: SJ
authors.lastname: Jang
authors.forename: L E
authors.initials: LE
authors.lastname: Cross