Polymorphic phase transition and enhanced piezoelectric properties in (Ba0.9Ca0.1)(Ti1-xSnx)O3 lead-free ceramics

被引:55
作者
Chen, Mingli [1 ]
Xu, Zhijun [1 ]
Chu, Ruiqing [1 ]
Liu, Yong [1 ]
Shao, Lin [1 ]
Li, Wei [1 ]
Gong, Shuwen [2 ]
Li, Guorong [3 ]
机构
[1] Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Peoples R China
[2] Liaocheng Univ, Coll Chem & Chem Engn, Liaocheng 252059, Peoples R China
[3] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
基金
国家高技术研究发展计划(863计划);
关键词
PPT; Electrical properties; Piezoelectric materials; Lead-free; Diffuse phase transition;
D O I
10.1016/j.matlet.2012.12.067
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Lead-free (Ba0.9Ca0.1)(Ti1-xSnx)O-3 (BCTS) (x=0.02-0.1) ceramics were fabricated using conventional solid state reaction method. The effects of Sn substitution on structure and electrical properties of the BCTS ceramics were researched. At room temperature, a polymorphic phase transition (PPT) from tetragonal phase to rhombohedral phase is identified from XRD patterns with increasing Sn content. High piezoelectric coefficient of d(33)=405 pC/N and planar mode electromechanical coupling factor of k(p)=43.2% are obtained for the sample at x=0.06. The ceramic for x=0.06 also shows uniform microstructure that contributes to the excellent electrical properties. These results indicate that this BCTS system with optimal composition is a promising lead-free piezoelectric material. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:86 / 89
页数:4
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