(Na,K,Li)(Nb,Sb)O_3无铅压电陶瓷的性能  

Properties of (Na_(0.5+x)K_(0.44)Li_(0.06–x))Nb_(0.95)Sb_(0.05)O_3 Lead-free Piezoelectric Ceramics

作　　者：郑立梅[1] 王矜奉[1] 臧国忠[1] 亓鹏[1] 杜鹃[1] 

机构地区：[1]山东大学物理与微电子学院晶体材料国家重点实验室,山东济南250100

出　　处：《电子元件与材料》2006年第7期21-22,25,共3页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(50572056);山东省重点自然科学基金资助项目(Z2003F04);国家基础科学研究和人才培养基地经费资助项目

摘　　要：采用传统的固相反应法和普通烧结工艺,制备了A位和B位复合的(Na0.5+xK0.44Li0.06–x)Nb0.95Sb0.05O3(x=0,0.006,0.012)系无铅压电陶瓷样品,并对样品的压电、机电性能进行了研究。结果表明:该陶瓷系列具有很高的压电应变常数(x=0.006时d33=243pC/N)、低的介质损耗(tanδ<2×10–2)、较高的机电耦合系数(x=0.012时,k33=0.632)、高的铁电顺电相变温度(tC约400℃)。这些性能显示了它是一种替代铅基PZT的具有很好应用前景的无铅压电陶瓷。A-site and B-site complex （Na0.5＋xK0.44Li0.06-x）Nb0.95Sb0.05O3 （x = 0, 0.006, 0,012） lead-free ceramics were prepared by conventional oxide solid-solution technique, The piezoelectric, electromechanical, properties of the ceramics were evaluated. The results show that this lead-free ceramics system has a relatively high piezoelectric constant（x = 0.006, d33 = 243 pC/N）, high electromechanical coupling factor k33 （x = 0.012, k33 = 0.632） and relatively low dielectric loss（tanδ〈2×10^-2） and a high Curie temperature of 400℃. These features indicate that ceramics （Na0.5＋xK0.44Li0.06-x）Nb0.95Sb0.05O3 is a promising candidate for replacing Pb-based PZT in piezoelectric application fields.

关 键 词：无机非金属材料 无铅压电陶瓷 机电耦合系数 压电常数 介电常数 电滞回线 

分 类 号：TM282[一般工业技术—材料科学与工程]