(K(0.52)Na(0.44)Li(0.04))(Nb(0.86)Ta(0.10)Sb(0.04))O3-BiFeO3无铅压电陶瓷的电性能  

Electrical Properties of(K_(0.52)Na_(0.44)Li_(0.04))(Nb_(0.86)Ta_(0.10)Sb_(0.04))O_3-BiFeO_3 Lead-Free Piezoelectric Ceramics

作　　者：余祖灯[1,2] 江向平[1] 杨庆[1] 陈超[1] 涂娜[1] 周树兰[1] 

机构地区：[1]景德镇陶瓷学院材料科学系,江西省先进陶瓷材料重点实验室,江西景德镇333001 [2]广东道氏标准制釉股份有限公司,广东佛山528000

出　　处：《硅酸盐学报》2011年第5期812-817,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50862005,51062005,91022027);江西省教育厅项目(GJJ10027,GJJ11196,GJJ11197);江西省高等学校“先进陶瓷材料”科技创新团队;江西省主要学科学术和技术带头人培养对象计划(2010DD00800)资助项目

摘　　要：采用固相法制备(1–x)(K0.52Na0.44Li0.04)(Nb0.86Ta0.10Sb0.04)O3–xBiFeO3[(1–x)LF4–xBF]无铅压电陶瓷,研究BF含量(0≤x≤0.010 00)对LF4陶瓷微观结构和电性能的影响。结果表明:所有样品均具有纯的四方钙钛矿结构,引入BF能明显改善LF4陶瓷的致密性,样品的机械品质因子Qm得到显著提高,压电性能和铁电性能随x的增加呈现出先升高后降低趋势。当x=0.002 50时,材料表现出优异性能:相对密度ρ=98.6%,压电常数d33=276pC/N,机械品质因子Qm=454,矫顽场Ec=1.56 kV/mm,剩余极化强度Pr=21.5μC/cm2。热稳定性和老化性研究结果显示:x=0.002 50时制备的LF4-BF体系样品具有稳定的电性能,表明该陶瓷在高温条件下具有潜在的应用前景。Lead-free piezoelectric ceramics（1–x）（K0.52Na0.44Li0.04）（Nb0.86Ta0.10Sb0.04）O3–xBiFeO3 [（1–x）LF4–xBF] were prepared by solid state reaction method.The effect of BF content（0≤x≤0.010 00） on the microstructure and electrical properties of the ceramics were investigated.It is found that all the samples has a pure perovskite phase structure with the tetragonal symmetry.The relative density ρ and mechanical quality factor Qm of LF4-based ceramics increase significantly after BF is added.Moreover,the piezoelec-tric and ferroelectric properties of LF4-based ceramics increase first and then decrease with the increase of BF content.The ceramic with x = 0.002 50 exhibits the optimal properties： the relative density ρ = 98.6%,piezoelectric constant d33 = 276 pC/N,mechanical quality factor Qm = 454,coercive field Ec = 1.56 kV/mm,and remanent polarization Pr = 21.5 μC/cm2.Thermal annealing and aging studies indicate that the LF4-BF sample（x = 0.002 50） possesses stable electrical properties,showing that the ceramic is a potential material for high temperature application.

关 键 词：无铅压电陶瓷 固相反应法 压电性能 老化性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]