Humidity sensitive properties of pure and Mg-doped CaCu3Ti4O12

被引：96

作者：

Li, M. ^{[1
]}

Chen, X. L. ^{[1
]}

Zhang, D. F. ^{[1
]}

Wang, W. Y. ^{[1
]}

Wang, W. J. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 147卷 / 02期

基金：

中国国家自然科学基金;

关键词：

CaCu3Ti4O12; Mg doping; Giant dielectric constant; Humidity sensor; Humidity sensitivity; HIGH-DIELECTRIC-CONSTANT; SENSING PROPERTIES; THIN-FILM; SENSORS; MICROSTRUCTURE; OXIDE;

D O I：

10.1016/j.snb.2010.03.063

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

CaCu3Ti4O12 (CCTO) is known as a dielectric material exhibiting a high and relatively temperature-independent dielectric constant over a wide temperature range from 100 to 400 K. Here, we report the huge responses of dielectric constant to relative humidity found in ceramic CCTO and Mg-doped CCTO. The dielectric constant at 97% relative humidity is about 5.8 times larger than that at 11% relative humidity for pure CCTO measured at 1 kHz. Mg doping enhances the sensitivity of dielectric constant to relative humidity. CCTO and Mg-doped CCTO are promising candidates for fabricating new humidity sensors. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：447 / 452

页数：6

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