PZT-BASED PIEZOELECTRIC CERAMIC MATERIAL AND PIEZOELECTRIC DEVICE USING THE SAME

摘要

Embodiments of the invention provide a PZT-based piezoelectric ceramic material represented by the following formula: Pbx(ZryTiz)M1-y-zO3, which is an ABO3 perovskite crystal material including a crystal lattice A-site and a crystal lattice B-site, x, y, and z satisfying the following Equations, respectively: 0.830≦x≦0.964, 0.43≦y≦0.55, and 0.43≦z≦0.55, and M being a metal element having a valence of +5 or +6, and a piezoelectric device using the same. According to at least one embodiment, since Pb is not excessively added, a Pb or PbO phase deteriorating piezoelectric properties is not formed in a PZT-based piezoelectric material, such that excellent electric, dielectric, and piezoelectric properties are exhibited.