Phase boundary design and high piezoelectric activity in (1-x)(Ba0.93Ca0.07)TiO3-xBa(Sn1-yHfy)O3 lead-free ceramics

JOURNAL OF ALLOYS AND COMPOUNDS

卷:666

Article

Zhao, Chunlin¹  Feng, Yimeng¹  Wu, Huaping²  Wu, Jiagang¹ 

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

[2] Zhejiang Univ Technol, Minist Educ & Zhejiang Prov, Key Lab E&M, Hangzhou 310032, Zhejiang, Peoples R China

关键词: Lead-free piezoelectric;    Barium titanate;    Co-doping;    Phase boundary;    Electrical properties;   

DOI  :  10.1016/j.jallcom.2016.01.105

来源: Elsevier

【 摘 要 】

The (1-x)(Ba0.93Ca0.07)TiO3-xBa(Sn1-yHfy)O-3 (BCTSH-x-y) lead-free ceramics were synthesised by the conventional solid-state reaction method, and the influences of doping elements (Ca, Sn, Hf) content on their phase structure, microstructure, and electrical properties were systematically investigated. The phase boundaries concerning the orthorhombic and tetragonal (O-T) phases were found in the 0.925(Ba0.93Ca0.07)TiO3-0.075Ba(Sn1-yHfy)O-3 ceramics with 0 <= y <= 0.25, and then the enhanced piezoelectric properties with d33 similar to 550 pC N-1 were obtained. In addition, the addition of Hf can also improve the Curie temperature (TC) and ferroelectric properties of the ceramics. As a result, the electrical properties of BaTiO3 can be optimized by the construction of phase boundaries through Ca, Sn, and Hf codoping. (C) 2016 Elsevier B.V. All rights reserved.

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