CuO掺杂对KNN-LS-BF无铅压电陶瓷性能的影响  

Effects of CuO Doping on Properties of KNN-LS-BF Lead-free Piezoelectric Ceramics

作　　者：翟霞[1] 王华[1] 崔业让[1] 袁昌来[1] 许积文[1] 张小文[1] 周昌荣[1] 江民红[1] 刘心宇[1] 

机构地区：[1]桂林电子科技大学材料科学与工程学院,桂林541004

出　　处：《人工晶体学报》2012年第4期967-972,共6页Journal of Synthetic Crystals

基　　金：广西自然科学基金重点项目(2010GXNSFD013007)

摘　　要：采用传统固相合成法和制备工艺,在1040℃制备了{0.996[0.95(Na0.5K0.5)NbO3-0.05LiSbO3]-0.004FeBiO3}+x mol%CuO(KNN-LS-BF+x mol%CuO)无铅压电陶瓷,研究了CuO掺杂量对陶瓷结构和性能的影响。结果表明,CuO的低温促烧作用明显,微量CuO的掺入并没有改变陶瓷体系的相结构,但对陶瓷的压电和介电性能有明显影响。随CuO掺杂量的增加,陶瓷的d33、kp、εr均是先升高后降低,并在x=0.15时,d33、kp、εr分别达到最大值222 pC/N、0.36、1223.14;Qm也是先升高后降低,不过是在x=0.3时达到了最大值66.02。而tanδ则是先降低,在x=0.45达到最小值2.5%后又开始回升。在x=0.15时,所制备压电陶瓷有最好的综合性能:d33=222pC/N,kp=0.36,εr=1223.14,tanδ=3.3%,Qm=52.27。0.996 [ 0.95 （ Na0. 5 K0. 5 NbO3-0.05 LiSbO3 ] -0.004FeBiO3 （ KNN-LS-BF ） lead-free ceramics were well sintered at 1040 ℃ with the addtion of x mol% CuO by the conventional fabrication technology. The effects of CuO doping on structural and piezoelectric properties of KNN-LS-BF ceramics were investigated. The results show that the CuO doping has no influence on the phase structure of KNN-LS-BF ceramics, but it is effective in promoting low-Fire and improving the piezoelectric properties of KNN-LS-BF ceramics. As the CuO content x increasing, the d33, kp and εr increases at first and then decreases as well as reached the maximum of 222 pC/N, 0. 36 and 1223. 14 around x = 0. 15, respectively; Qm changed as same as preceding, but the maximum is 66.02 when x =0.3 ; while tanδ changed oppositely, it＇s minimum and best value was 2.5% around x =0.45. The specimen have the best comprehensive properties when x =0.3 and the relating constants are ： d33 = 222 pC/N,kp = 0.36,εr = 1223.14, tanδ = 3.3 %, Qm = 52.27.

关 键 词：无铅压电陶瓷 CuO掺杂 性能 

分 类 号：TQ174[化学工程—陶瓷工业]