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On optimum composition of platinum-doped stannic oxide as an active element for methane sensing in air via sensitivity measurements

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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Abstract

Samples of platinum-doped stannic oxide were prepared by dry pressing method and sintered at 1000 °C for 1 hour, at heating rate of 20 °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 – 1 wt% platinum in stannic oxide at an operating temperatures 250 – 400 °C, at a flow rate of 400 sccm with methane in air concentration of 25000 ppm. At an operating temperature of 400 °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 °C as optimum operating temperature.

Item Type:Article
Subjects:Q Science > QC Physics
Divisions:Science
ID Code:6766
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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