Crystalline phase and electrical properties of lead-free piezoelectric KNN-based films with different orientations

被引:17
|
作者
Chen, Wen [1 ,2 ,3 ]
Wang, Lingyan [1 ,2 ]
Ren, Wei [1 ,2 ]
Niu, Gang [1 ,2 ]
Zhao, Jinyan [1 ,2 ]
Zhang, Nan [1 ,2 ]
Liu, Ming [1 ,2 ]
Tian, Ye [1 ,2 ]
Dong, Ming [1 ,2 ]
机构
[1] Xi An Jiao Tong Univ, Minist Educ, Key Lab, Elect Mat Res Lab, Xian, Peoples R China
[2] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian, Peoples R China
[3] Xian Univ Architecture & Technol, Xian, Peoples R China
基金
对外科技合作项目(国际科技项目); 中国国家自然科学基金;
关键词
electrical properties; lead-free ceramics; orientation; structure; thin films; THIN-FILMS; CERAMICS; MEMS;
D O I
10.1111/jace.14828
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Lead-free piezoelectric 0.915K(0.5)Na(0.5)NbO(3)-0.075BaZrO(3)-0.01Bi(0.5)Na(0.5)TiO(3) (KNN-BZ-BNT) films were grown on Nb-doped SrTiO3 substrates with different orientations. The thin films show highly preferential orientations in accordance with the orientations of single crystalline substrates. The films all exhibit a weak contrast and remarkable homogeneity in the local static out-of-plane piezoresponse phase images, suggesting a strong self-polarization. Combining with the analysis of XRD-RSM, TEM and PFM, the crystalline phase of our samples was determined to be rhombohedral, which has the spontaneous polarization along [111] direction. Thus, the (100)-oriented film demonstrates the most superior piezoelectric properties. Our detailed studies on structural and electrical properties of KNN-BZ-BNT films further clarify the structure-property relationship and make a step closer to use this lead-free material for many piezoelectric applications.
引用
收藏
页码:2965 / 2971
页数:7
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