Ibrahim, Zuhairi and Othaman, Zulkafli and Abd Karim, Mohd Mustamam and Saidin, Mohd Khairi and Husin, Rosli (2003) On optimum composition of platinum-doped stannic oxide as an active element for methane sensing in air via sensitivity measurements. Journal of solid state science and technology, 10 (2). pp. 15-20. ISSN 0128-8393
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Samples of platinum-doped stannic oxide were prepared by dry pressing method and sintered at 1000 Â°C for 1 hour, at heating rate of 20 Â°C per minute, served as an active element in a gas sensor for detecting methane in air. The sensitivity of the gas sensor was measured for samples at nominal dopant levels, 0 â€“ 1 wt% platinum in stannic oxide at an operating temperatures 250 â€“ 400 Â°C, at a flow rate of 400 sccm with methane in air concentration of 25000 ppm. At an operating temperature of 400 Â°C, the sensitivity measurements recorded a maximum value of ~1578 at 0.5 wt% Pt in stannic oxide. Therefore we consider 0.5 wt% Pt in stannic oxide as the optimum composition while operating 400 Â°C as optimum operating temperature.
|Subjects:||Q Science > QC Physics|
|Deposited By:||Assoc Prof Dr Zulkafli Othaman|
|Deposited On:||10 Nov 2008 03:08|
|Last Modified:||10 Nov 2008 03:08|
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