A High Temperature Piezoelectric Accelerator Based on BGSPT Ceramics

A kind of high temperature piezoelectric accelerator based on 0.02BiGaO3-0.32BiScO3-0.66PbTiO3(BGSPT66) ceramics is investigated.The BGSPT66 piezoelectric ceramics prepared by the conventional solid phase processing has the piezoelectric constant(d33) of 320 pC/N and Curie temperature(TC) of about 465 ℃.A vertical pressure piezoelectric accelerator has been designed by using BGSPT ceramics as the piezoelectric vibrator and the dependence of the sensitivity on the temperature stability has been tested.The experimental results show that the BGSPT piezoelectric accelerator has stable output signals at 20~200 ℃,the relative sensitivity(S) of about 18 mV·s2/mm and good low frequency stability.This piezoelectric accelerator has the features of small size,high sensitivity and good temperature stability and is hopeful of applications to the oil exploration and the aerospace fields.