二步烧结法制备SCNN陶瓷及其性能

摘要

By using two-stage sintering method based on the traditional process equipment,one lead free piezoelectric ceramics Sr2-xCaxNaNb5O15（SCNN） was prepared.By studying the different Sr doping concentrations x from 0.05 to 0.30,piezoelectric constant is up to 80 pC/N,and dielectric permittivity is even more than 1 600.This SCNN ceramics are characterized by X-ray diffraction and scanning electron microscope.Results show that this ceramics have high density structure.%在传统工艺设备制备的基础上,运用二步烧结法制备出钨青铜结构压电陶瓷Sr2-xCaxNaNb5O15（SCNN）,通过对x=0.05～0.30的陶瓷研究,获得了具有较高压电系数（80pC/N）和介电常数（〉1600）的SCNN陶瓷.X线衍射实验及扫描电镜实验的结果表明,该陶瓷具有极高的致密性.