激光陀螺用压电陶瓷材料的制备与研究

Preparation and Research of Piezoelectric Ceramics Used for Laser Gyro

通过文献调研设计了压电陶瓷配方,使用传统固相法制备目标压电陶瓷以达到大应变要求,以应用于激光陀螺激光稳频器中,通过r（Zr）/r（Ti）系列实验可得r（Zr）/r（Ti）=46/54组成在1 180℃烧结时获得最佳的压电介电性能,即压电常数d33≈640pC/N,弹性刚度系数cE11=60.61GPa,相对介电常数εT33/ε0≈3 300,介电损耗tanδ≈1.85%,机电耦合系数kp=0.655,居里温度TC=272℃。X线衍射（XRD）分析确认相界组成为r（Zr）/r（Ti）=46/54,扫描电镜（SEM）表明烧结温度对陶瓷晶粒尺寸有显著影响,在1 180～1 200℃之间晶粒尺寸显著增大。

To improve the large strain of piezoelectric ceramics used for the laser frequency stabilizer in laser gyro,the composition of piezoelectric ceramics was designed and synthesized by the conventional solid-state reaction method. The excellent piezoelectric and dielectric properties were obtained at r （Zr）/r （Ti）= 46/54 s intered at 1180 ℃ for 3 h：d33≈640 pC/N,cE11 =60.61 GPa,εT33/ε0≈3300,tan δ≈1.85%,kp=0. 655,Tc=272℃. XRD anal- ysis indicated that the morphotropic phase boundary composition was r（Zr）/r（Ti）= 46/54. SEM showed that the sintering temperature had significantly influence for the ceramic grain size with rapid increase of grain size at 1 180～1 200℃.