BNKT-BZT陶瓷的制备和性能研究  

Preparation and Properties of BNKT-BZT Lead-free Piezoelectric Ceramics

作　　者：张林慧 廖运文[1,2] 李伟 姜宁 王文芳 

机构地区：[1]化学合成与污染控制四川重点实验室,四川南充637009 [2]西华师范大学应用化学研究所,四川南充637009

出　　处：《压电与声光》2013年第5期727-729,733,共4页Piezoelectrics & Acoustooptics

基　　金：四川省科技厅应用基础研究基金资助项目(2011JY0058)

摘　　要：采用传统固相法制备了Bi0.5(Na0.825K0.175)0.5TiO3-Ba(Tiy Zr1-y)O3(BNKT-BZT)无铅压电陶瓷。运用XRD、SEM等技术表征了陶瓷的晶体结构、形貌、介电和压电性能。研究结果表明,在所研究的结构范围内,所有陶瓷样品都形成钙钛矿固溶体。陶瓷晶粒的尺寸随x、y适当的增大而增大,压电性能随x、y的增大先增大后减小,在x=0.05,y=0.2(摩尔比)时,压电常数d33=157pC/N,介电常数εr=1 510。A new lead-free piezoelectric ceramics of Bi0.5（ Na0.825K0.175）0.5TiO3-Ba （Tiy Zrl-y ）O3（BNKT-BZT） was prepared by conventional ceramic sintering method. The microstructure, surface topography, dielectric and pie- zoelectric properties were studied by X-Ray diffraction （XRD） and the scanning electron microscope （SEM）. The results showed that all the ceramics investigated could form a pure perovskite structure, the grain size were in- creased with the increase of x and y. The piezoelectricity was increased first then decreased with the increase of x and y. The piezoelectric constant and the dielectric constant of the ceramics were up to the maximum value of 157 pC/N and 1 510 respectively at x=0.05, y=0.2.

关 键 词：铋钛酸钠 压电陶瓷 钙钛矿结构 压电性能 

分 类 号：TN282[电子电信—物理电子学]