Preparation and Humidity Sensing Properties of KCl/MCM-41 Composite

KCl/mobil composition of matter-41 （MCM-41） composite has been synthesized via a heat-treating process and characterized by x-ray diffraction, high resolution transmission electron microscopy, and nitrogen adsorption/desorption isotherms. In contrast with pure MCM-41, KCl/MCM-41 composite exhibits i...

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Bibliographic Details
Published inChinese physics letters Vol. 27; no. 5; pp. 44 - 47
Main Author 刘丽 寇立英 仲志成 王连元 刘丽芳 李伟
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.05.2010
Subjects
Desorption
Detection
Diffraction
Heat treatment
Humidity
Isotherms
Relative humidity
Response time
复合材料
材料合成
湿度传感器
湿敏性能
热处理工艺
相对湿度
高分辨透射电子显微镜
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Summary:KCl/mobil composition of matter-41 （MCM-41） composite has been synthesized via a heat-treating process and characterized by x-ray diffraction, high resolution transmission electron microscopy, and nitrogen adsorption/desorption isotherms. In contrast with pure MCM-41, KCl/MCM-41 composite exhibits improved humidity sensing properties within the relative humidity range of 11-95%. The impedance of KCl/MCM-41 composite changes by about four orders of magnitude over the whole humidity range with the response time and the recovery times are about 30s and 35s, respectively. Small humidity hysteresis and good stability are also observed based on our product. These results make our product a good candidate in fabricating humidity sensors with high performances and low synthetic complexity.
Bibliography:11-1959/O4
TB33
TQ174.758
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/27/5/050701