摘要
采用传统陶瓷制备技术制备了0.95K0.47Na0.47Li0.06NbO3-0.05Ba0.95Sr0.05TiO3无铅压电陶瓷,研究了烧结温度和掺杂剂对其微结构及压电铁电性能的影响,对可能的机理进行了探讨。扫描电镜(SEM)分析表明,适当的烧结温度有利于陶瓷压电铁电性能的提高。实验结果表明,MnO2掺杂使陶瓷的压电铁电性能得到较大的提高,其中压电常数d=135pC/N,机电耦合系数k=42%,剩余极化强度P=69.1μC/cm2。
Lead-free piezoelectric ceramics 0.95K0.47Na0.47Li0.06NbO3-0.05Ba0.95Sr0.05TiO3 had been fabricated by an ordinary ceramic technique.The effect of different sintering temperatures and additives on the microstructure and electrical properties of the ceramics were investigated,and the possible mechanism was discussed.Scanning electron microscope （SEM） analysis showed that the appropriate sintering temperature is helpful to the improvement of piezoelectric and ferroelectric properties of the ceramics.The results indicated that the doping of MnO2 could greatly improve piezoelectric as well as the ferroelectric properties of the ceramics：the piezoelectric constant d33=135 pC/N,the electromechanical coupling coefficient kp=42%,and the remanent polarization Pr=69.1 μC/cm2.
出处
《压电与声光》
CAS
CSCD
北大核心
2010年第5期830-832,836,共4页
Piezoelectrics & Acoustooptics
基金
安徽省教育厅青年教师科研计划基金资助项目(2007JQl148)
合肥学院人才引进基金资助项目(600835)
合肥学院科研发展基金资助项目(07KY001ZR)
关键词
烧结温度
掺杂剂
压电性能
铁电性能
sintering temperature
doping
piezoelectric property
ferroelectric property
