PbZrO_3对0.1BiYbO_3-0.9PbTiO_3压电陶瓷相结构和电性能的影响  

Effect of PbZrO_3 on the Phase Structure and Electrical Properties of 0.1BiYbO_3-0.9PbTiO_3 Piezoelectric Ceramics

作　　者：杨乐[1] 高峰[1] 邓贞奇[1] 田长生[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《压电与声光》2010年第4期646-649,653,共5页Piezoelectrics & Acoustooptics

基　　金：西安应用材料创新基金资助项目(XA-AM-200808);西北工业大学基础研究基金资助项目(G9KY101902)

摘　　要：采用传统固相反应法合成(1-x)(0.1BiYbO3-0.9PbTiO3)-xPbZrO3(BYPT-PZ)压电陶瓷,研究了PbZrO3含量对0.1BiYbO3-0.9PbTiO3(BYPT)压电陶瓷的相结构及电性能的影响规律。结果表明,PbZrO3的添加可有效抑制焦绿石相Yb2Ti2O7的生成,BYPT-PZ陶瓷由钙钛矿相和ZrO2相组成,随PbZrO3含量的增加,介电常数rε、压电常数d33、机电耦合系数kp不断增加,居里温度TC、机械品质因数Qm、介电损耗tanδ不断减小。当x(PbZrO3)=0.45时材料性能最佳,d33=223 pC/N,TC=390℃,rε=1 265,kp=0.42,剩余极化强度Pr=20μC/cm2,矫顽场强Ec=2.4 kV/mm。（1-x）（0.1BiYbO3-0.9PbTiO3）-xPbZrO3（BYPT-PZ） piezoelectric ceramics were prepared by the conventional solid state reaction.The effects of the content of PbZrO3 on the phase structure and electrical properties were investigated.The result revealed that the addition of PbZrO3 can suppress the generation of the pyrochlore phase effectively.There were two phases coexisting in the BYPT-PZ ceramics,one is the perovskite phase,the other is ZrO2 phase.With the increasing of PbZrO3,the dielectric constant of εr,the piezoelectric constant of d33 and the electric mechanism of kp increased,while the curie temperature of TC,the mechanical quality factor of Qm and the dielectric loss of tanδ decreased.When the content of PbZrO3 was 0.45 mol,the performances of the material were optimum.The piezoelectric costant（d33）,Curie temperature（TC）,dielelctric constant（εr）,electric mechanism（kp）,the remnant polarization（Pr） and the coercive field（Ec） could be 223 pC/N,390 ℃,1 265,0.42,20 μC/cm2 and 2.4 kV/mm respectively.

关 键 词：压电陶瓷 相结构 居里温度 

分 类 号：TM282[一般工业技术—材料科学与工程]