CAJ | 학술논문

采用传统的固相反应法制备了（1-x）（Na0.65K0.35）0.94Li0.06NbO3-xmol%MnO2无铅压电陶瓷,研究了Mn的掺杂对陶瓷压电和介电性能的影响.实验结果表明,所有的样品都显示出四方相钙钛矿结构.材料的平均晶粒尺寸随着MnO2掺杂量的增加逐渐变大.MnO2的添加使样品的压电常数d33、平面机电耦合系数kp、机械品质因数Qm、介电损耗tanδ和相对密度均得到明显改善.当MnO2的掺杂量为0.50mol%的时候,样品的性能达到最佳：d33=144pC/N,kp=42%,tanδ=2.4%,Qm=168.以上数据表明,该陶瓷材料是一种极具应用潜力的无铅压电陶瓷材料.
채용전통적고상반응법제비료（1-x）（Na0.65K0.35）0.94Li0.06NbO3-xmol%MnO2무연압전도자,연구료Mn적참잡대도자압전화개전성능적영향.실험결과표명,소유적양품도현시출사방상개태광결구.재료적평균정립척촌수착MnO2참잡량적증가축점변대.MnO2적첨가사양품적압전상수d33、평면궤전우합계수kp、궤계품질인수Qm、개전손모tanδ화상대밀도균득도명현개선.당MnO2적참잡량위0.50mol%적시후,양품적성능체도최가：d33=144pC/N,kp=42%,tanδ=2.4%,Qm=168.이상수거표명,해도자재료시일충겁구응용잠력적무연압전도자재료.
（1-x）（Na0.65K0.35）0.94Li0.06NbO3-xmol%MnO2 lead-free piezoceramics were prepared by conventional solid-state sintering method and their dielectric and piezoelectric characteristics were investigated.All samples possess tetragonal perovskite phases.The average grain size increases gradually with increasing MnO2 content.Appropriate amount of MnO2 results in an improvement in piezoelectric constants d33,planar electromechanical coupling factors kp,mechanical quality factors Qm,dielectric loss tanδ and promotes densification of the（Na0.65K0.35）0.94Li0.06NbO3 ceramics.Enhanced piezoelectric and electromechanical properties are obtained with x=0.50： d33=144pC/N,kp=42%,tanδ=2.4% and Qm=168,showing that they could be promising candidates as lead-free piezoelectric materials.