Phase transitions and electrical properties of (1-x)(K0.5Na0.5)NbO3-xBiScO3 lead-free piezoelectric ceramics with a CuO sintering aid

被引：23

作者：

Li, Xuhai ^{[1
]}

Jiang, Meng ^{[1
]}

Liu, Jing ^{[1
]}

Zhu, Jiliang ^{[1
]}

Zhu, Xiaohong ^{[2
]}

Li, Lihua ^{[1
]}

Zhou, Yu ^{[1
]}

Zhu, Jianguo ^{[1
]}

Xiao, Dingquan ^{[1
]}

机构：

[1] Sichuan Univ, Dept Mat Sci, Chengdu 610064, Peoples R China

[2] CEA, LETI, MINATEC, F-38054 Grenoble 9, France

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2009年 / 206卷 / 11期

关键词：

D O I：

10.1002/pssa.200925036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

(1-x)(K0.5Na0.5)NbO3-xBiScO(3) doped with 1 mol% CuO (KNN-BS-Cu-x) lead-free piezoelectric ceramics were prepared by the solid state reaction technique. With the CuO doping, all the ceramics can be well sintered at 1090-1150 degrees C and exhibit a perovskite structure. After the substitution of BiScO3, the polymorphic phase transition (PPT) was shifted to near room temperature; besides, the cubic-tetragonal phase transitions were also shifted to lower temperatures and a relaxor behavior was induced. The ceramic (x=0.018) with PPT near room temperature exhibited excellent electrical properties (d(33) = 224 pC/N, k(P) = 0.40, and T-C = 331 C). A relatively high mechanical quality factor (288) was also obtained in this particular composition. All these results reveal that KNN-BS-Cu-x ceramics may become promising candidates for lead-free piezoelectric materials. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2622 / 2626

页数：5

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