The contribution of doped-Al to the colossal permittivity properties of AlxNb0.03Ti0.97-xO2 rutile ceramics

被引：98

作者：

Song, Yongli ^{[1
]}

Wang, Xianjie ^{[1
]}

Zhang, Xingquan ^{[2
]}

Sui, Yu ^{[1
]}

Zhang, Yu ^{[1
]}

Liu, Zhiguo ^{[1
]}

Lv, Zhe ^{[1
]}

Wang, Yang ^{[3
]}

Xu, Ping ^{[4
]}

Song, Bo ^{[1
,3
]}

机构：

[1] Harbin Inst Technol, Sch Sci, Dept Phys, Harbin 150001, Peoples R China

[2] Southwest Univ Sci & Technol, Analit & Testing Ctr, Mianyang 621010, Peoples R China

[3] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Harbin 150001, Peoples R China

[4] Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150001, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2016年 / 4卷 / 28期

基金：

对外科技合作项目（国际科技项目）; 中国国家自然科学基金;

关键词：

DIELECTRIC PERMITTIVITY; MODULUS SPECTROSCOPY; CACU3TI4O12; ORIGIN; NB; TIO2; PERFORMANCE; CONSTANT; ROUTE; PLUS;

D O I：

10.1039/c6tc00742b

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The search for colossal permittivity (CP) materials continues to attract considerable interest motivated by not only academic research but also potential applications. Very recently, CP with low dielectric loss was reported in In + Nb co-doped rutile TiO2 polycrystalline ceramics. However, the mechanism of CP in this material system and the effect of doping ions are still unclear. Here, we investigated the dielectric properties of AlxNb0.03Ti0.97-xO2 (x = 0, 0.01, 0.03 and 0.05) ceramics. CP with low dielectric loss was found in AlxNb0.03Ti0.97-xO2 samples (x <= 0.03). Once the amount of Al-doping exceeds Nb, the CP disappears. The change in dielectric response with varying Al-doping concentration and Ti3+ concentration together with the conductive activation energy in AlxNb0.03Ti0.97-xO2 ceramics clearly suggest that the CP mechanism in co-doped TiO2 ceramics could be attributed to the internal barrier layer capacitor effect. We believe that our research provides comprehensive guidance for the development of CP materials.

引用

页码：6798 / 6805

页数：8

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