Improved Piezoelectricity in (K0.44Na0.52Li0.04) (Nb0.91Ta0.05Sb0.04)O3-xBi0.2
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- 作者：Yan Zhao ; Zhijun Xu ; Huaiyong Li ; Jigong Hao ; Juan Du…
- 关键词：Lead ; free ; piezoelectric ceramics ; microstructure ; electrical properties
- 刊名：Journal of Electronic Materials
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：46
- 期：1
- 页码：116-122
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
- 出版者：Springer US
- ISSN：1543-186X
- 卷排序：46
文摘
(1 − lic ">x)[(K0.44Na0.52Li0.04)(Nb0.91Ta0.05Sb0.04)O3]-xBi0.25Na0.25NbO3 (KNLNTS-xBNN) lead-free piezoelectric ceramics have been prepared using a conventional solid-state reaction method and the effects of BNN on their phase structure, microstructure, and electrical properties systematically studied. X-ray diffraction analysis suggested that BNN substitution into KNLNTS induced coexistence of orthorhombic–tetragonal mixed phase and thus improved the ferroelectric and piezoelectric properties. The surface morphologies indicated that different amounts of BNN had two different effects on grain growth. Good electrical properties (d33 = 256 pC N−1, Tc = 354.27°C, kp = 43.43%, Pr = 26.85 μC cm−2, Ec = 24.47 kV cm−1) were simultaneously obtained at x = 0.0025, suggesting that our research could benefit development of (K,Na)NbO3-based ceramics and widen their application range.
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