⟨001⟩ textured (K0.5Na0.5)Nb0.97Sb0.03)O3 piezoelectric ceramics with high electromechanical coupling over a broad temperature range

被引：118

作者：

Chang, Yunfei ^{[1
,2
,3
]}

Poterala, Stephen F. ^{[1
,2
]}

Yang, Zupei ^{[3
]}

Trolier-McKinstry, Susan ^{[1
,2
]}

Messing, Gary L. ^{[1
,2
]}

机构：

[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

[3] Shaanxi Normal Univ, Sch Chem & Mat Sci, Xian 710062, Shaanxi, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 23期

关键词：

LEAD-FREE PIEZOCERAMICS; TEMPLATED GRAIN-GROWTH;

D O I：

10.1063/1.3271682

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

< 001 >-oriented (K0.5Na0.5)Nb0.97Sb0.03)O-3 (KNNS) ceramics with a narrow orientation distribution (full width at half maximum= 7.0 degrees) were produced by templated grain growth using NaNbO3 templates. Excellent electromechanical properties were obtained from -70 degrees C to the polymorphic phase transition (PPT) at 160 degrees C. Textured KNNS ceramics show very high electromechanical coupling factors k(p)=0.64 and k(31)=0.37, high piezoelectric constants d(33)=208-218 pC/N and d(31)=-82 pC/N, and modest strain hysteresis (6.3%) at room temperature. These properties are superior to those of randomly oriented KNN-based ceramics with similar PPT temperatures. c 2009 American Institute of Physics. [doi: 10.1063/1.3271682]

引用

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