(K0.5Na0.5)0.96Li0.04Nb0.86Ta0.1Sb0.04O3–SrZrO3 ceramics with good fat
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- 作者：Juan Du ; Zhijun Xu ; Ruiqing Chu ; Jigong Hao…
- 刊名：Journal of Materials Science: Materials in Electronics
- 出版年：2016
- 出版时间：December 2016
- 年：2016
- 卷：27
- 期：12
- 页码：13249-13258
- 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;
- 出版者：Springer US
- ISSN：1573-482X
- 卷排序：27
文摘
(1 − x)(K0.5Na0.5)0.96Li0.04Nb0.86Ta0.1Sb0.04O3–xSrZrO3 (KNLNST–xSZ) (x = 0.000, 0.005, 0.010 and 0.015) lead-free ceramics were prepared by conventional solid-state sintering method. Crystal structure was determined using X-ray diffraction. The microstructure of the ceramics was observed by field emission electron microscope. The ceramics possessed a tetragonal perovsktie structure at room temperature without impurity phase. The average grain size was found to increase with increasing SZ. Meanwhile, the grain size distribution became much broader. According to the impedance analysis, the movements of oxygen vacancies played an important role in the conduction behavior at higher temperatures. The γ value increased from 1.18 for x = 0.000 to 1.31 for x = 0.010, implying that the characteristics of KNLNST–xSZ ceramics transferred from ferroelectric to more relaxor-like with increasing SZ content. Accordingly, the temperature stability and fatigue behavior of the modified ceramics were significantly improved, demonstrating that these materials had excellent potential for demanding high cycle and high temperature applications.
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