Effective electromechanical properties of ferroelectric piezoactive composites of the crystal-ceramic type based on (Pb1−xCax)TiO3

Based on the previously proposed models, effective electromechanical properties of the ferroelectric piezoactive composites of the “single-domain crystal-ceramic” and “polydomain crystal-ceramic” types are determined for the first time. Features of the concentration dependence of the piezoelectric coefficients of four types (e 3 * , d 3 * , g 3 * , and h 3 * ) are interpreted. Advantages of the new composites in comparison with the known ferroelectric piezoceramic materials of the PbTiO3 type are considered and explained. It is shown that the coefficients e 3 * are most sensitive to a change in the system parameters; some reasons for this sensitivity are established.