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http://dx.doi.org/10.4191/KCERS.2003.40.10.973

Responses of SnO2-based Sensors for Oxidizing Gases  

정해원 (국방과학연구소)
박희숙 (국방과학연구소)
김종명 (국방과학연구소)
윤기현 (연세대학교 세라믹공학과)
Publication Information
Abstract
The effects of additives in n-type semiconducting SnO$_2$-based gas sensors on oxidizing gases were investigated. The resistivity of SnO$_2$ sensors decreased when exposed to reducing gases, which act as electronic donors. However, the resistivities of the SnO$_2$ sensors increased when exposed to oxidizing gases, which act as electronic accepters. The products formed from the reaction of oxidizing gases ever SnO$_2$-based powders were analyzed by gas chromatography as compared with those formed from the reaction of reducing gases of alcohols. The SnO$_2$ sensors doped with PdCl$_2$ or A1$_2$O$_3$ showed unique dual response patterns toward oxidizing gases of $CH_3$CN and $CH_3$NO$_2$ depending on the operating temperature. The combination of these two sensors along with proper pattern recognition technique could enhance the selectivity for the gases with electron-accepting groups.
Keywords
Tin oxide; Gas sensor; Oxidizing gas; Gas chromatography;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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