溶胶-凝胶法制备(Bi_(0.5)Na_(0.5))_(1-x)Ba_xTiO_3陶瓷的性能  

Properties of (Bi_(0.5)Na_(0.5))_(1-x)Ba_xTiO_3 ceramics prepared by sol -gel method

作　　者：赵明磊[1] 王渊旭[1] 王春雷[1] 王矜奉[1] 张家良[1] 王晓颖[1] 

机构地区：[1]山东大学物理与微电子学院,济南250100

出　　处：《功能材料与器件学报》2004年第4期413-417,共5页Journal of Functional Materials and Devices

基　　金：国家重点基础研究发展规划项目(No.G1998061408);山东自然科学基金(No.Z2003Fo4)

摘　　要：测量了使用溶胶-凝胶工艺制备的(Bi0.5Na0.5)1-xBaxTiO3(x=0,0.02,0.04,0.06)系无铅压电陶瓷的介电、压电和弹性参数。研究发现,该工艺制备的(Bi0.5Na0.5)0.94Ba0.06TiO3陶瓷具有此系列最强的压电性能,与传统工艺制备的该类压电陶瓷相比,溶胶-凝胶工艺制备的(Bi0.5Na0.5)0.94Ba0.06TiO3陶瓷具有压电常数(d33=173×10-12C/N)、机电耦合系数(kt=56%,kp=26%)、泊松比(ν=0.3)提高;频率常数(Nt=2250Hz·m,Np=2810Hz·m)、退极化温度(Td=75℃)降低以及介电常数(εTr33=820)、介电损耗(tgδ=3.9%)稍大的特点。The dielectric,piezoelectric and elastic properties of(Bi 0.5 Na 0.5 ) 1-x Ba x TiO 3 (x =0,0.02,0.04,0.06)ceramics prepared by sol -gel method were investigated.It is found that(Bi 0.5 Na 0.5 ) 0.94 -Ba 0.06 TiO 3 ceramic shows superior piezoelectr ic properties in this system.The(Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 TiO 3 ceramic prepared by sol -gel method s hows higher piezoelectric constant (d 33 =173×10 -12 C /N),higher electromechanical coupling coefficient (k t =56%,k p =26%),larger Poisson ratio(б=0.3),larger dielectric constant (ε T r33 =820)and larger dielectric loss(tgδ=3.9%),but lower frequency constants(N t =2250Hz ·m,N p =2810Hz ·m)and lower depolarization temperatu res(T d =75℃)than the values of the ceramics prepared by conventional technique.

关 键 词：溶胶-凝胶 (Bi0.5Na0.5)1-xBaxTiO3 系列 无铅压电陶瓷 压电性能 

分 类 号：TM282[一般工业技术—材料科学与工程] TM223[电气工程—电工理论与新技术]