Y_2O_3掺杂对(Ba_(0.85)Ca_(0.15))Zr_(0.1)Ti_(0.896)Sm_(0.004)O_3无铅压电陶瓷介电弛豫与电性能的影响  

Effect of Y_2O_3 Doping on Dielectric Relaxation and Electrical Properties of BCZTS Lead-free Piezoelectric Ceramics

作　　者：黄小琴[1] 刘其斌[1,2] 张诚[1] 姚利兰 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]凯里学院化学与材料工程学院,凯里556011

出　　处：《人工晶体学报》2014年第10期2573-2579,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51362004);贵州省工业攻关资助项目(黔科合GY字[2013]3027)

摘　　要：采用固相法制备了(Ba0.85Ca0.15)1-xYxZr0.1Ti0.896Sm0.004O3(BCZTS-Yx)无铅压电陶瓷.研究了Y2O3含量对BCZTS-Yx无铅压电陶瓷相结构、压电与介电性能的影响.结果表明:Y3+作为施主掺杂物占据A位。当0.004≤x≤0.006时,陶瓷存在三方相与四方相共存的准同型相界结构。当x=0.006时,陶瓷具有最佳的电性能,分别为d33=384 pC/N,kp=37.2%,εr^6775,tanδ~2.04%.利用Curie-Weiss定律对该实验结果进行拟合,发现x为0.006的样品的介电弛豫特征更为明显。（ Ba0. 85Ca0. 15）1-xYxZr0. 1Ti0. 896Sm0. 004O3（ BCZTS-Yx） lead-free piezoelectric ceramics were prepared by a solid state reaction method. The effects of Y2O3 doping on phase structure,piezoelectric and dielectric properties of BCZTS-Yxceramics were investigated. The results show that Y^3 ＋occupies the A-site and functions as a donor. A morphotropic phase boundary（ MPB） between rhombohedral and tetragonal phases was identified in the composition range of 0. 004≤x≤0. 006. The ceramic with x = 0.006 exhibits the optimum properties,d33= 384 pC /N,kp= 37. 2%,εr- 6775,tanδ - 2. 04%,respectively. The dielectric relaxation of ceramic with x = 0. 006 is more evident,which were consistent with the Curie-Weiss law fitting.

关 键 词：无铅压电陶瓷 Y2O3 介电弛豫 压电性能 

分 类 号：O482.31[理学—固体物理]