CuO掺杂对KNN-BNZ无铅压电陶瓷性能的影响  

Effects of CuO Dopping on the Properties of KNN-BNZ Lead-Free Piezoelectric Ceramics

作　　者：张金平[1] 蔡艳艳 王二萍[1] 高景霞[1] 李慧[1] 李亚林[2] 

机构地区：[1]黄河科技学院信息工程学院,郑州450006 [2]河南工程学院资源与环境学院,郑州451191

出　　处：《人工晶体学报》2016年第5期1235-1240,共6页Journal of Synthetic Crystals

基　　金：河南省教育厅自然科学计划项目(14B510007;14B510005);河南省高等学校重点科研项目(15A610010);郑州市科技局项目(20130679;20130685;20140756;20140615;20150237;121PYFZX178)

摘　　要：采用传统固相反应法制备了0.97K_(0.5)Na_(0.5)NbO_3-0.03Bi_(0.5)Na_(0.5)ZrO_3+xmol%CuO(0.97KNN-0.03BNZ+xCu)无铅压电陶瓷。研究不同CuO掺量(x=0、0.5、1、2、3和4)对0.97KNN-0.03BNZ陶瓷的显微结构和电学性能的影响。结果表明:CuO的掺入使材料出现"硬化"现象,机械品质因数Qm有明显提高,矫顽场显著增大。CuO的掺入量在3%时,样品的综合性能最佳:压电常数(d33)为137 p C/N,机电耦合系数(kp)为0.30,机械品质因数(Qm)为238,介电损耗(tanδ)为1.5%。另外,从SEM图片中可以看出:0.97KNN-0.03BNZ压电陶瓷材料的平均晶粒尺寸随着CuO掺入量的增加明显增大,这表明CuO有烧结助熔作用,能降低烧成温度。Lead-free 0.97K_（0.5）Na_（0.5）NbO_3-0.03Bi_（0.5）Na_（0.5）ZrO_3＋ xmol% CuO（0.97KNN-0.03 BNZ ＋xCu） piezoelectric ceramics were prepared by traditional solid phase technique.The effects of different CuO contents（x = 0,0.5,1,2,3 and 4） on microstructure and electric properties of obtained samples were investigated.The results show that CuO addition ＂ hardened ＂ the piezoelectric ceramics and significantly enhanc the mechanical quality factor Qmand the coercive field Ec.When CuO content is3%,the highest electric properties of piezoelectric constant d33= 137 p C/N,planar coupling factor kp=0.30,mechanical quality factor Qm= 238,dielectric loss tanδ = 1.5%.Furthermore,the grain size of those increase as the CuO-doping content increasing that was observed form the SEM image,which indicate the addition of CuO could lower the sintering temperature.

关 键 词：无铅压电陶瓷 CuO掺杂 压电性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]