多孔質圧電素子の圧電的および音響的特性

抄録

Porous lead zirconate titanate ceramics for a considerably wide porosity range, i. e., O to more than 70%, were prepared by using spherical organic materials, poly-methyl methacrylate spheres and polystyrene foams, as pore forming substrates. The piezoelectric properties and hydrophone sensitivities were measured. The experimental results of the dielectric constants and the 3-1 mode piezoelectric properties agreed with the Banno's theoretical predictions, while the 3-3 mode piezoelectric properties did not. The hydrophone sensitivities increased around