Sheet-shaped piezoelectric device, method for making same, and piezoelectric vibrator and piezoelectric sound generator using same

摘要

A sheet-shaped piezoelectric device comprises a sheet of a ferroelectric composite oxide having piezoelectric properties and a dielectric constant of 4000 or over, and a pair of electrodes directly formed on opposite sides of the sheet. Each electrode is made of a metal and is free of a glass component. A method for making such a device is also described along with a piezoelectric vibrator and a piezoelectric sound generator.