文献类型：期刊文献

英文题名：Effect of rhombohedral-orthorhombic phase transition on structure and electrical properties of KNN-based lead-free piezoceramics

作者：Chen, X.[1,2,3];Li, Y.[1];Zeng, J.[2];Zheng, L.[2];Zhou, Y.[2,3];Xu, K.[2,3];Politova, E. D.[4];Li, G.[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai, Peoples R China;[3]Univ Chinese Acad Sci, Beijing, Peoples R China;[4]L Ya Karpov Inst Phys Chem, Moscow, Russia

年份：2016

卷号：505

期号：1

起止页码：10

外文期刊名：FERROELECTRICS

收录：;EI(收录号：20165203170763);WOS:【SCI-EXPANDED(收录号:WOS:000392617400003)】；

基金：This work is supported by the National Key Project for Basic Research of China (Nos. 2012CB619406 and 2013CB632900), International Science & Technology Cooperation Program of China (No. 2013DFR50800), National Natural Science Foundation of China (Nos. 61137004, 61275181 and 61311120086), NSAF(Nos. U1330119 and U1330120), and the CAS/ SAFEA International Partnership Program for Creative Research Teams.

语种：英文

外文关键词：Ceramics; phase transition; sintering; electrical properties

摘要：Lead-free ceramics (1-x)(Na0.7K0.3)(0.92)Li0.08NbO3-xCaZrO(3) (KNNL-xCZ) have been synthesized by the conventional solid-state reaction. X-ray diffraction shows that all ceramics are in pure perovskite phase. The study of their phase transition observed by the temperature-dependent dielectric measurements confirms that the addition of CZ leads to alternation of crystal structure. The KNNL-0.03CZ ceramics exhibit optimum electrical properties and produce large strain response (dS/dE = 193pm/V). The enhanced properties of the KNNL-xCZ are attributed to the effect of rhombohedral-orthorhombic phase transition in the vicinity of room temperature.