Abstract
Barium strontium titanate ((Ba0·87Sr0·13)TiO3-BST) ceramic powder was prepared by mechanochemical process. The thick films of different thicknesses of BST were prepared by screen-printing technique and gas-sensing performance of these films was tested for various gases. The films showed highest response and selectivity to ammonia gas. The effect of film thickness on gas response was also studied. As prepared BST thick films were surface modified by dipping them into an aqueous solution of titanium chloride (TiCl3) for different intervals of time. Surface modification shifted response to H2S gas suppressing the responses to ammonia and other gases. The surface modification, using dipping process, altered the adsorbate-adsorbent interactions, which gave the unusual sensitivity and selectivity effect. Sensitivity, selectivity, thermal stability, response and recovery time of the sensor were measured and presented.
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Jain, G.H., Patil, L.A., Patil, P.P. et al. Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors. Bull Mater Sci 30, 9–17 (2007). https://doi.org/10.1007/s12034-007-0003-z
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DOI: https://doi.org/10.1007/s12034-007-0003-z