Effects of Mg doping on electrical properties of Ba0.7Ca0.3TiO3 ceramics

被引：21

作者：

Jaiban, Panupong ^{[1
]}

Watcharapasorn, Anucha ^{[2
,3
]}

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

来源：

MATERIALS TODAY COMMUNICATIONS | 2017年 / 11卷

关键词：

Ferroelectric properties; Perovskites; Electrical properties; Dielectric properties; FREE PIEZOELECTRIC CERAMICS; LEAD-FREE CERAMICS; DIELECTRIC-PROPERTIES; BEHAVIOR;

D O I：

10.1016/j.mtcomm.2017.05.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

(Ba0.7Ca0.3) Ti1- xMgxO3- x ceramics where x = 0, 0.005, 0.015 and 0.02 were prepared employing a solid state sintering technique. The abrupt decrease of tetragonality was induced by doping with x >= 0.015. Ti K-edge X-ray Absorption Near- Edge Structure (XANES) spectra indicated spontaneous polarization weakness of doped ceramics. The grain size was decreased due to the creation of oxygen vacancies and solute-drag effect. The reduction of the phase transition temperature, ferroelectricity and piezoelectricity was observed in correlation with the decrease in tetragonality. Dielectric properties near room temperature of the samples could be enhanced with Mg addition. The results here suggested that the electrical properties of this ceramic may be largely tunable by Mg dopant and could be an attractive material for high- dielectric response devices.

引用

页码：184 / 190

页数：7

共 25 条

[1] Anomalous phase diagram of ferroelectric (Ba,Ca)TiO3 single crystals with giant electromechanical response [J].