烧结温度对(Bi0.94Na0.89Li0.05)0.5Ba0.06TiO3压电陶瓷电性能和微观结构的影响  

Effect of Sintering Temperature on Electrical Properties and Microstructure of(Bi0.94Na0.89Li0.05)0.5Ba0.06TiO3 lead-free Piezoelectric Ceramics

作　　者：师金华 SHI Jinhua(Institute of Ethnic Minority Preparatory,Ningxia University,Yinchuan Ningxia 750002)

机构地区：[1]宁夏大学民族预科教育学院,宁夏银川750002

出　　处：《河南科技》2020年第34期53-56,共4页Henan Science and Technology

基　　金：宁夏高等学校科学技术研究项目(NGY2018032)。

摘　　要：本文采用传统固相反应法制备(Bi0.94Na0.89Li0.05)0.5Ba0.06TiO3(缩写为BNLBT)压电陶瓷。同时,研究不同烧结温度对BNLBT陶瓷体密度、相结构、显微结构、压电性能和介电性能的影响。XRD和扫描电镜显示,所有的BNLBT陶瓷样品均形成了三方、四方固溶体,有较高的体密度。1120℃烧结的陶瓷,体密度达到极值,此时陶瓷样品有很好的电性能(介电常数εr=810,压电常数d33=128 pC/N,平面机电耦合系数kp=0.30)。(Bi0.94Na0.89Li0.05)0.5Ba0.06TiO3(abbreviated as BNLBT)piezoelectric ceramics were produced by a convention⁃al solid-state reaction method.At different sintering temperatures of BNLBT ceramics,we have explored their bulk density,crystalline phase,microstructure,piezoelectric and dielectric properties.X-ray diffraction and scanning elec⁃tron microscopy analysis show that all the BNLBT ceramic samples are higher bulk density and form a complete solid solution of both rhombohedral and tetragonal.When the sintering temperature is 1120℃,BNLBT ceramic samples own the highest bulk density and better electrical properties(dielectric constantεr=810,piezoelectric constant d33=128 pC/N,planar electromechanical coupling factor kp=0.30).

关 键 词：无铅压电陶瓷 烧结温度 电性能 微观结构 

分 类 号：TM282[一般工业技术—材料科学与工程]