Electric-field-induced phase-change behavior in (Bi0.5Na0.5)TiO3-BaTiO3-(K0.5Na0.5)NbO3: A combinatorial investigation

被引：213

作者：

Daniels, John E. ^{[1
]}

Jo, Wook ^{[2
]}

Roedel, Juergen ^{[2
]}

Honkimaeki, Veijo ^{[1
]}

Jones, Jacob L. ^{[3
]}

机构：

[1] European Synchrotron Radiat Facil, ID15, F-38043 Grenoble, France

[2] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany

[3] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 06期

基金：

美国国家科学基金会;

关键词：

Electroceramics; Piezoelectricity; Phase transformation; X-ray diffraction (XRD); X-ray fluorescence; TRANSITIONS; NA0.5BI0.5TIO3; CERAMICS; SYSTEM; TEM;

D O I：

10.1016/j.actamat.2009.11.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electric-field-induced strain behavior in (1 - x - y)(Bi0.5Na0.5)TiO3-xBaTiO(3)-y(K0.5Na0.5)NbO3 electroceramics has been studied using a combinatorial technique. A stoichiometrically graded sample was produced to contain compositions across the ternary phase diagram between the two end-member components of 0.93(Bi0.5Na0.5)TiO3-0.07BaTiO(3) and 0.86(Bi0.5Na0.5)TiO3-0-14(K0.5Na0.5)NbO3. Both composition and structural information were measured simultaneously during the application of electric fields using secondary Xray fluorescence and high-energy X-ray microdiffraction, respectively. An initial electric-field-induced distortion from the pseudo-cubic structure is seen across all compositions, while those with a greater concentration of BaTiO3 also undergo an electric-field-induced phase transformation. The microstructural contribution to the macroscopic strain within the 0.93(Bi0.5Na0.5)TiO3-0.07BaTiO(3) end member is quantified at a field strength of 5.5 kV mm(-1); 0.08% and 0.11% of the measured macroscopic strain of 0.4% is contributed by the induced ferroelastic domain texture and the volumetric strain associated with the electric-field-induced phase transformation, respectively. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2103 / 2111

页数：9

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