Low power thick film CO gas sensors

SnO 2/Pt thick film CO gas sensors were fabricated by a screen printing method. The sensors were fired in the temperature range 500 to 1000 °C wit a mixing ratio of Pt to SnO 2 of 0.2 – 1.0 wt.%. The sensitivity, selectivity and response time for CO gas in air of the sensors with various composition...

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Bibliographic Details
Published inSensors and actuators Vol. 12; no. 4; pp. 441 - 447
Main Authors Lee, Duk-Dong, Sohn, Byung-Ki, Ma, Dong-Sung
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 1987
Elsevier Sequoia
Subjects
Analytical chemistry
Chemistry
Exact sciences and technology
Miscellaneous
Chemical analysis
Semiconductor materials
Thick film
Tin IV Oxides
Instrumentation
Carbon monoxide
Manufacturing
Gas detector
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Summary:SnO 2/Pt thick film CO gas sensors were fabricated by a screen printing method. The sensors were fired in the temperature range 500 to 1000 °C wit a mixing ratio of Pt to SnO 2 of 0.2 – 1.0 wt.%. The sensitivity, selectivity and response time for CO gas in air of the sensors with various compositions and sintering temperatures were investigated as a function of operating temperature. The sensors showed a low operating temperature (about 100 °C) and high sensitivity of CO gas. The sensors fired at 600 °C exhibited the highest sensitivity when the SnO 2/Pt ratio was 99.5/0.5 by weight. They showed good sensitivity to CO gas in comparison with those for other gases (H 2, C 4H 10 and C 3H 8) at 100 °C. They had a short respose time (about 2 s for 200 ppm of CO gas at 100 °C).
ISSN:0250-6874
DOI:10.1016/0250-6874(87)80062-8