PIEZOELECTRIC-ELECTROSTRICTIVE MATERIAL AND ITS PRODUCTION METHOD

摘要

A piezoelectric/electrostrictive material is made of a BaTiO3-based porcelain composed mainly of BaTiO3, and a strain (S4000) of transversal direction is 650 x 10<-6> or more in an electric field of 4,000 V/mm. This porcelain has a Curie temperature of 110 to 130 DEG C, and its crystal phase at ambient temperature consists essentially of tetragonal and cubic phases. The piezoelectric/electrostrictive material being composed of this porcelain is superior in strain to conventional products, and can be suitably used in an actuator or a sensor.