Improved dielectric properties of (Y plus Mg) co-doped CaCu3Ti4O12 ceramics by controlling geometric and intrinsic properties of grain boundaries

被引：88

作者：

Boonlakhorn, Jakkree ^{[1
]}

Putasaeng, Bundit ^{[2
]}

Kidkhunthod, Pinit ^{[3
]}

Thongbai, Prasit ^{[4
]}

机构：

[1] Khon Kaen Univ, Fac Sci, Mat Sci & Nanotechnol Program, Khon Kaen 40002, Thailand

[2] Natl Sci & Technol Dev Agcy, Natl Met & Mat Technol Ctr, Thailand Sci Pk, Pathum Thani 12120, Thailand

[3] Synchrotron Light Res Inst Publ Org, 111 Univ Ave, Muang Dist 30000, Nakhon Ratchasi, Thailand

[4] Khon Kaen Univ, Dept Phys, INRC, Fac Sci, Khon Kaen 40002, Thailand

来源：

MATERIALS & DESIGN | 2016年 / 92卷

关键词：

Dielectric permittivity; Impedance spectroscopy; Loss tangent; CaCu3Ti4O12; Co-doping; ELECTRICAL-PROPERTIES; PERMITTIVITY; BEHAVIOR;

D O I：

10.1016/j.matdes.2015.12.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Significantly improved dielectric properties of CaCu3Ti4O12 ceramics were accomplished by co-doping with Y3+ and Mg2+ to simultaneously control the geometric and intrinsic properties of grain boundaries (GB), respectively. Substitution of these dopants strongly suppressed grain growth while enhancing the resistivity of an individual GB, respectively. The resulting small grained microstructure with very high GB density and greatly increased resistivity resulted in a strong increase in the total resistance of GBs. This caused a large decrease in the loss tangent (tan delta similar to 0.013). Furthermore, nonlinear current-voltage properties were also improved. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：494 / 498

页数：5

共 22 条

[1] The effect of different dopant site (Cu and Ca) by magnesium on CaCu3Ti4O12 dielectric properties [J].