摘要
采用固相反应法制备(K0.49Na0.51)0.94Li0.06Nb0.94SbxTa0.06-xO3(KNNLSxT0.06-x,x=0.00～0.06)无铅压电陶瓷,研究了Sb的掺杂量对陶瓷晶体结构与压电性能的影响。X射线衍射结果表明:随着Sb掺杂量x的增加,陶瓷的晶体结构由正交相向四方相转变,并在x=0.04～0.05时出现正交相逐渐转变为四方相的多型相转变(PPT),在x=0.04时具有较佳的性能:压电常数d33=258 pC/N,平面机电耦合系数kp=54%,机械品质因素Qm=61以及较高的居里温度Tc=405℃。
（K_（0.49）Na_（0.51））_（0.94）Li_（0.06）（Nb_（0.94）Ta_（0.06））O_3（ KNNLS_xT_1-x ,x = 0.00-0.06 ） lead-free piezoelectric ceramics are prepared by the solid state reaction method. The effect of Sb doping content on the crystal structure and piezoelectric properties are investigated in detail. XRD results indicate that the crystal structure of the ceramics changes from an orthorhombic phase to a tetragonal one with the increasing of Sb doping amount, and the polymorphic phase transition of orthorhombic to tetragonal phases is observed when x = 0.04-0.05. The optimal properties can be obtained for the composition of x = 0.04. The piezoelectric constant d33 = 258 pC/N, planar electromechanical coupling coefficient kp = 54%, mechanical quality factor Qm =61 and relatively high curie temperature Tc =405 ℃.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2012年第3期581-584,589,共5页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(No.50962007)
江西省主要学科学术和技术带头人培养计划(2010DD01100)
江西省自然科学基金(2009GZC0063)
景德镇市学科带头人项目
关键词
无铅压电陶瓷
铌酸钾钠
居里温度
lead-free piezoelectric ceramics
sodium potassium niobate
curie temperature
