气候变化领域集成服务门户(CCPortal): The structural origin of enhanced piezoelectric performance and stability in lead free ceramics†

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DOI	10.1039/c6ee03597c
	The structural origin of enhanced piezoelectric performance and stability in lead free ceramics†
	Zheng T.; Wu H.; Yuan Y.; Lv X.; Li Q.; Men T.; Zhao C.; Xiao D.; Wu J.; Wang K.; Li J.-F.; Gu Y.; Zhu J.; Pennycook S.J.
发表日期	2017
ISSN	17545692
起始页码	528
结束页码	537
卷号	10 期号:2
英文摘要	Lead-based piezoelectric materials are currently facing global restrictions due to their lead toxicity. Thus it is urgent to develop lead-free substitutes with high piezoelectricity and temperature stability, among which, potassium-sodium niobate [(K,Na)NbO3, KNN] has the most potential. It is very difficult to simultaneously achieve high piezoelectric performance and reliable stability in KNN-based systems. In particular, the structural/physical origin for their high piezoelectricity is still unclear, which hinders property optimization. Here we report the achievement of high temperature stability (less than 10% variation for electric field-induced strain from 27 8C to 80 8C), good fatigue properties (stable up to 106 cycles) as well as an enhanced piezoelectric coefficient (d33) of 525 pC N1 in (1 x)(K1yNay)(Nb1zSbz)O3–xBi0.5(Na1wKw)0.5HfO3 (KNNS–BNKH) ceramics through manipulating the rhombohedral–tetragonal (R–T) phase boundary. The structural origin of their high piezoelectric performance can be attributed to a hierarchical nanodomain architecture, where the local structure inside nanodomains comprises R and T nanotwins. The physical origin can be attributed to low domain wall energy and nearly vanishing polarization anisotropy, facilitating easy polarization rotation among different states. We believe that the new breakthrough will open a window for the practical applications of KNN-based ceramics. © The Royal Society of Chemistry 2017.
英文关键词	Ceramic materials; Crystallography; Electric fields; Niobium compounds; Piezoelectric devices; Polarization; Sodium; Stability; Structural ceramics; Electric-field-induced strain; High piezoelectricities; High temperature stability; Lead-free substitutes; Piezoelectric coefficient; Polarization anisotropy; Polarization rotation; Potassium sodium niobate; Piezoelectricity; anisotropy; ceramics; high temperature; lead; optimization; performance assessment; piezoelectricity; polarization
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190523
作者单位	Department of Materials Science, Sichuan University, Chengdu, 610064, China; Department of Materials Science and Engineering, National University of Singapore117575, Singapore; State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China; Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Pudong New Area, Shanghai, 201204, China
推荐引用方式 GB/T 7714	Zheng T.,Wu H.,Yuan Y.,等. The structural origin of enhanced piezoelectric performance and stability in lead free ceramics†[J],2017,10(2).
APA	Zheng T..,Wu H..,Yuan Y..,Lv X..,Li Q..,...&Pennycook S.J..(2017).The structural origin of enhanced piezoelectric performance and stability in lead free ceramics†.Energy & Environmental Science,10(2).
MLA	Zheng T.,et al."The structural origin of enhanced piezoelectric performance and stability in lead free ceramics†".Energy & Environmental Science 10.2(2017).