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자료유형
학술저널
저자정보
저널정보
한국전기전자재료학회 전기전자재료학회논문지 전기전자재료학회논문지 제18권 제10호
발행연도
2005.1
수록면
917 - 923 (7page)

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In this paper, effect of catalytic configuration on the sensing properties of SnO2 nanoparticle gas sensitive thick film was investigated. Two types of catalytic configuration, mono and binary, were made on the SnO2 nanoparticle. In case of mono catalytic system, 3 wt% Pd or Pt catalyst was doped onto the SnO2 nanoparticle, respectively. In case of binary catalytic system, Pd and Pt was doped simultaneously with concentration ratio of 1:2 to 2:1 onto the SnO2 nanoparticle. After doping, gas sensitive thick film was printed on alumina substrate and heat-treated at 450 to 600 ℃. Gas sensing properties was evaluated using 500 to 10,000 ppm CH4 gas. As a result, gas sensitive thick film with binary catalytic system showed unstable phenomena that the gas sensitivity was changed according to aging time. In contrary, the mono catalytic system showed relatively stable phenomena despite of aging time. Especially, gas sensitive thick film doped with 3 wt% Pt catalyst and heat-treated at 500 ℃ showed good sensing properties such as 0.57 of R3500/R1000 and very small variation within 3.5 % after aging for 5 hours, and response time was very short less than 20 seconds.

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