Piezoelectric Ceramics for High Temperature Actuators.

摘要

High temperature piezoelectrics have been developed to expand the operating conditions of actuators for fuel modulation and dampening of high temperature structural parts. Development of high temperature piezoelectric ceramics will increase the efficiency of engines, decrease emissions and improve the life of structural components in aerospace and aeronautical applications that are strongly relevant to the Department of Defense missions. Actuators require application of electric field to obtain displacement that can be used to move loads, block or disturb flow at high frequencies and create acoustic and ultrasonic waves. Ceramics are stable at high temperatures, however their conductivity starts to increase.