Ferroelectric and piezoelectric properties of lead-free Bi0.5Na0.5 TiO3-Bi0.5K0.5TiO3-BaTiO3-thin films near the morphotropic phase boundary

被引：29

作者：

Acharya, Susant Kumar ^{[1
]}

Kim, Tae-Min ^{[1
]}

Hyung, Jung-Hwan ^{[2
]}

Ahn, Byung-Guk ^{[1
]}

Lee, Sang-Kwon ^{[3
]}

机构：

[1] Chonbuk Natl Univ, Hydrogen & Fuel Cell Res Ctr, Div Adv Mat Engn, Jeonju 561756, South Korea

[2] Chonbuk Natl Univ, Dept Semicond Sci & Technol, Basic Res Lab BRL, Jeonju 561756, South Korea

[3] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 586卷

基金：

新加坡国家研究基金会;

关键词：

BNT-BT thin film; Piezoelectric; Ferroelectric; Morphotropic; Phase boundary; Perovskite structure; THIN-FILMS; ELECTRICAL-PROPERTIES; DIELECTRIC-PROPERTIES; LEAKAGE CURRENT; SOL-GEL; CERAMICS; MICROSTRUCTURE; TEMPERATURE; TITANATE;

D O I：

10.1016/j.jallcom.2013.10.028

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lead-free Bi0.5Na0.5TiO3 (BNT)-Bi0.5K0.5TiO3 (BKT)-BaTiO3 (BT) piezoelectric thin films with compositions near the morphotropic phase boundary (MPB) were deposited by metal-organic solution deposition on Pt/Ti/SiO2/Si (100) substrates. The compositional dependences of their microstructure and ferroelectric/piezoelectric properties were investigated. The results indicated that all the thin films have a single-phase perovskite structure and show outstanding electrical properties at room temperature. We found that the thin film with a composition of 0.884BNT-0.08BKT-0.036BT showed the best structural and electrical properties, with a dielectric constant, remnant polarization, and effective piezoelectric constant of similar to 638, similar to 27 mu C/cm(2) and similar to 79 pC/N, respectively. We suggest that these superior properties are due to this sample's high degree of alignment of ferroelectric domains in the MPB region and largest grain size. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：549 / 554

页数：6

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