Origin of superior hardening properties in KCuTa3O9-doped K0.5Na0.5NbO3lead-free piezoelectric ceramics

doi:10.1016/j.ceramint.2017.08.126

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	Origin of superior hardening properties in KCuTa3O9-doped K0.5Na0.5NbO3lead-free piezoelectric ceramics
	Cao XZ(曹兴忠); Wang, Tao; He, Lihua; Deng, Yunlong; Zheng, Qiaoji; Li, Qiang; Jiang, Na; Xu, Chenggang; Cao, Xingzhong; Lin, Dunmin
刊名	Ceramics International
	2017
卷号	43 期号:17 页码:15666-15677
关键词	Lead-free piezoelectric ceramic Piezoelectricity Ferroelectricity Defect dipoles
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2017.08.126
文献子类	Article
英文摘要	K0.5Na0.5NbO3 + x mol KCuTa3O9 lead-free piezoelectric ceramics with superior hardening properties were synthesized by a solid-state reaction method. The addition of a small amount of KCuTa3O9 (x <= 0.04) induces the formation of (Cu'''(Nb) - V-O(..))' (DC1) and (V-O(..) - Cu'''(Nb) - V-O(..) )(.) (DC2) defect dipoles; however, DC2 becomes dominant in the ceramics with high levels of KCuTa3O9. The DC1 can provide a restoring force to reverse the switched polarization, inducing double hysteresis loops, while DC2 slightly impedes polarization back-switching. Because of the combination of DC1 and DC2 associates, the ceramics become gradually "hardened" with x increasing from 0 to 0.01, giving a superhigh mechanical quality factor Q(m) of 2494 at x = 0.01, and then are gradually softened with x further increasing to 0.07, exhibiting a relatively low Qm of 549 at x = 0.07. Our study shows that the control of defect structures can effectively tailor the ferroelectricity and piezoelectricity of K0.5Na0.5NbO3-based lead-free ceramics.
电子版国际标准刊号	1873-3956
WOS关键词	POTASSIUM-SODIUM NIOBATE ; ELECTRICAL-PROPERTIES ; DIELECTRIC-PROPERTIES ; DEFECT DIPOLES ; PZT CERAMICS ; FERROELECTRIC PEROVSKITES ; PARAMAGNETIC-RESONANCE ; SINTERING TEMPERATURE ; FREE PIEZOCERAMICS ; PHASE BOUNDARIES
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000413175300150
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285302]
专题	中国科学院高能物理研究所_中国散裂中子源高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Cao XZ,Wang, Tao,He, Lihua,et al. Origin of superior hardening properties in KCuTa3O9-doped K0.5Na0.5NbO3lead-free piezoelectric ceramics[J]. Ceramics International,2017,43(17):15666-15677.
APA	曹兴忠.,Wang, Tao.,He, Lihua.,Deng, Yunlong.,Zheng, Qiaoji.,...&徐成刚.(2017).Origin of superior hardening properties in KCuTa3O9-doped K0.5Na0.5NbO3lead-free piezoelectric ceramics.Ceramics International,43(17),15666-15677.
MLA	曹兴忠,et al."Origin of superior hardening properties in KCuTa3O9-doped K0.5Na0.5NbO3lead-free piezoelectric ceramics".Ceramics International 43.17(2017):15666-15677.