International Journal on Science and Technology

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Gas Sensing Study of Strontium Oxide Thick Films Fabricated by Screen Printing Method

Author(s) Ajay Ashok Nikam, Mohsin Y. Shaha
Country India
Abstract In the present study, strontium oxide (SrO) thick films were successfully fabricated using the screen printing technique and systematically investigated for their gas sensing performance toward selected gases like LPG, CO₂, H₂S, and methanol. The structural simplicity, low cost and scalability of the screen printing method make it suitable for the development of practical gas sensor devices. The sensing characteristics were evaluated in terms of sensitivity, selectivity, gas concentration (ppm) variation, and response /recovery time. The SrO thick films exhibited a pronounced and selective response toward LPG, achieving a maximum sensitivity of 78.96% at an optimal operating temperature of 150 °C for a gas concentration of 500 ppm. Comparative studies revealed significantly lower responses toward CO₂, H₂S, and methanol, confirming excellent selectivity of the SrO films for LPG detection. The sensor demonstrated fast response and recovery characteristics with response and recovery times of 16 s and 53 s, respectively, indicating efficient adsorption–desorption kinetics on the film surface. These results highlight the potential of SrO thick films as promising candidates for low-cost, sensitive, and selective LPG sensors operating at moderate temperatures.
Keywords SrO thick films; screen printing technique; LPG sensor; gas sensitivity; selectivity; chemoresistive gas sensing
Published In Volume 16, Issue 1, January-March 2025
Published On 2025-01-22
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