稀土掺杂Pb(Mg1/3Nb2/3)O3-PbTiO3压电陶瓷的烧结特性研究

Sintering Characteristics of Rare Earth Doped Pb(Mg1/3Nb2/3)O3-PbTiO3 Piezoelectric Ceramics

在传统的固相反应制备工艺中,固相反应的烧结温度直接影响着陶瓷的物相结构、陶瓷致密度以及介电性能等。本文采用固相反应法制备x%Sm3+掺杂PMN-PT压电陶瓷,通过控制不同的烧结温度,制备了一系列Sm-PMNPT陶瓷样品。利用X射线衍射仪、介电温谱以及准静态d33测量仪对陶瓷结构、介电性能、压电系数等性能进行表征。研究结果表明:烧结温度在1250℃,x=1. 875mol%~2. 5mol%,陶瓷样品的钙钛矿含量最大,压电系数最高可达1254 p C/N,kp=0. 58,相对介电常数高达30000左右,密度达到8. 48 g/cm3。

In the traditional solid phase preparation process,the sintering temperature of solid phase directly affects the phase structure,density and dielectric properties of ceramics.In this paper,x%Sm 3+doped PMN-PT piezoelectric ceramics were prepared by solid phase reaction method,and a series of Sm-PMNPT ceramics samples were prepared by controlling different sintering temperatures.The properties of ceramic structure,dielectric property and piezoelectric coefficient were characterized by X-ray diffractometer,dielectric temperature spectrum and quasi-static d 33 measuring instrument.Research results show that the sintering temperature at 1250℃,x=1.875mol%-2.5mol%,ceramic samples of perovskite content is biggest,the piezoelectric coefficient of up to 1254 pC/N,k p=0.58,the relative dielectric constant is as high as 30000,density of 8.48 g/cm 3.