Effects of donor and acceptor doping on dielectric and ferroelectric properties of Ba0.7Ca0.3TiO3 lead-free ceramics

被引：39

作者：

Jaiban, Panupong ^{[1
]}

Watcharapasorn, Anucha ^{[2
,3
]}

Yimnirun, Rattikorn ^{[4
,5
]}

Guo, Ruyan ^{[6
]}

Bhalla, Amar S. ^{[6
]}

机构：

[1] King Mongkuts Univ Technol North Bangkok, Fac Sci Energy & Environm, Rayong Campus, Rayong 21120, Thailand

[2] Chiang Mai Univ, Dept Phys & Mat Sci, Fac Sci, Chiang Mai 50200, Thailand

[3] Chiang Mai Univ, Mat Sci Res Ctr, Fac Sci, Chiang Mai 50200, Thailand

[4] Suranaree Univ Technol, Sch Phys, Inst Sci, Nakhon Ratchasima 30000, Thailand

[5] Suranaree Univ Technol, NANOTEC SUT COE Adv Funct Nanomat, Nakhon Ratchasima 30000, Thailand

[6] Univ Texas San Antonio, Coll Engn, Dept Elect & Comp Engn, San Antonio, TX 78249 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷

基金：

美国国家科学基金会;

关键词：

Ferroelectric; Vacancy formation; Microstructure; Crystal structure; Dielectric response; FREE PIEZOELECTRIC CERAMICS; ELECTRICAL-PROPERTIES; SINTERING TEMPERATURE; MICROSTRUCTURE;

D O I：

10.1016/j.jallcom.2016.10.274

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：

(Ba0.7Ca0.3) TiO3, (Ba0.7Ca0.3)(0.995)Ti0.99Nb0.01O3 and (Ba0.7Ca0.3) Ti0.99Mg0.01O2.99 ceramics were prepared employing a solid state sintering method. The presence of Ti4+ and structural changes were revealed by X-ray diffraction patterns and X-ray absorption spectra. Upon substitution of Nb5+ and Mg2+ ions, a decrease of the ferroelectric transition temperature near room temperature and relaxor-like features of the dielectric properties were observed in correlation with decreased tetragonality. The change in phase transition temperature affected significantly piezoelectricity and ferroelectricity of doped ceramics. The doping could enhance the dielectric properties near room temperature of BCT ceramic. The results here suggest that dielectric, piezoelectric and ferroelectric properties of BCT may be largely tunable by Nb and Mg dopants, and BCT could be an alternative material for ferroelectric devices. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1329 / 1335

页数：7

共 28 条

[1] The perovskite structure - a review of its role in ceramic science and technology [J].