| 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3无铅压电陶瓷的显微结构分析与电学性能 |
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| 引用本文： | 赵永杰,赵玉珍,黄荣厦,刘荣正,周和平.0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3无铅压电陶瓷的显微结构分析与电学性能[J].稀有金属材料与工程,2011(Z1):405-407. |
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| 作者姓名： | 赵永杰 赵玉珍 黄荣厦 刘荣正 周和平 |
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| 作者单位： | 清华大学新型陶瓷与精细工艺国家重点实验室 |
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| 基金项目： | 国家自然科学基金(50972073) |
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| 摘 要： | 采用传统固相反应合成法制备0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3基无铅压电陶瓷,研究了烧结温度对0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3陶瓷相结构、显微组织和压电介电性能的影响。结果表明,在960~1060℃的温度区间内,所得到的一系列烧结样品在室温下均为纯的钙钛矿型结构,未观察到第二相出现;随着烧结温度的升高,晶粒的平均尺寸显示出先增大后减小的趋势,在1020℃时晶粒的平均粒径达到最大值3.5μm。电学性能分析表明,烧结温度为1020℃时,该体系陶瓷压电介电性能达到最优值:d33=245pC/N,kp=0.42,tanδ=0.03,ε3T3/ε0=640,Ec=2.1kV/mm,Pr=20μC/cm2。
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| 关 键 词： | 无铅压电陶瓷 晶体结构 压电性能 介电性能 |
Microstructure and Electrical Properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3 Ceramics |
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| Zhao Yongjie, Zhao Yuzhen, Huang Rongxia, Liu Rongzheng, Zhou Heping.Microstructure and Electrical Properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3 Ceramics[J].Rare Metal Materials and Engineering,2011(Z1):405-407. |
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| Authors: | Zhao Yongjie Zhao Yuzhen Huang Rongxia Liu Rongzheng Zhou Heping |
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| Affiliation: | ( State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China) |
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| Abstract: | Lead-free piezoelectric ceramics 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3 (KNN-5LNS) were synthesized by the conventional ceramic sintering technique. The phase structure, microstructure and electrical properties of KNN-5LNS ceramics were investigated. The results of XRD indicate that KNN-5LNS possess a pure tetragonal structure. With the sintering temperature increasing, the average size of grains first increases and then decreases. Maximum value 3.5 μm was obtained for samples sintered at 1020 ℃. The KNN-5LNS sintered at 1020 ℃ obtains the optimum electrical properties: d33=245 pC/N, kp=0.42, tanδ=0.03, =640, Ec=2.1 kV/mm, and Pr =20 μC/cm2 |
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| Keywords: | lead-free ceramics crystal structure piezoelectric properties dielectric properties |
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