Electrical and Gas-Sensing Properties of a Thick Film Resistor of Nanosized SnO2 with Variable Percentage of Permanent Binder
Nanosized SnO2 powder was synthesized by thermal decomposition of tin di acetate at 380°C. The effect of permanent binder (5, 10, 15, and 20 wt%) on the electrical and gas-sensing properties of thick film planar resistors shows sheet resistivity four to five orders of magnitude smaller, with comparatively low temperature coefficient of resistance. The sensors with 15 wt% of glass show the highest sensitivity toward H2, CO, and liquefied petroleum gas (300 ppm) at optimal temperatures of 150°, 220°, and 190°C, respectively, giving selectivity. The sensors are tested for 10–300 ppm of gas with a response and recovery time of 10 and 20 s, respectively.
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Document Type: Research Article
Affiliations: Department of Physics, Center for Advanced Studies in Material Science and Solid State Physics, University of Pune, Pune-411 007, India
Publication date: 2006-11-01