Studies on the resistive response of nickel and cerium doped SnO₂ thick films to acetone vapor

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• 作者：L.K. Bagal ; J.Y. Patil ; I.S. Mulla ; S.S. Suryavanshi
• 关键词：SnO2 ; Screen-printing ; Acetone vapor ; (Ni+Ce)-doping
• 刊名：Ceramics International
• 出版年：2012
• 出版时间：December, 2012
• 年：2012
• 卷：38
• 期：8
• 页码：6171-6179
• 全文大小：1481 K

文摘

Undoped and Ni, Ce-doped nanocrystalline tin oxide were synthesized by co-precipitation route. Doped as well as undoped SnO₂ compositions revealed single phase structure without any impurity. The lattice constant of SnO₂ increases and the grain size decreases with doping of Ni and Ce. The responses of the sensing elements are evaluated by measuring the resistance change upon exposure to various test gases such as liquid petroleum gas (LPG), acetone, ethanol and ammonia. In comparison to LPG, ethanol, and ammonia the response towards acetone vapor increases markedly on simultaneous doping of Ni and Ce. For acetone vapors with 500 ppm at 300 ¡ãC, the undoped SnO₂ shows 31 % response, while with individual Ni or Ce doping it increases to 38 and 60 % , respectively, however with simultaneous doping of Ni and Ce there is a significant enhancement up to 92 % . The results of gas sensing measurements reveal that the thick films deposited on alumina substrates using screen printing technique give selectively a high response of (87 % ) with fast recovery (¡«1 min) towards 100 ppm acetone at 300 ¡ãC.