Kundu, Susmita and Kumar, Amit (2019) Low concentration ammonia sensing performance of Pd incorporated indium tin oxide. Journal of Alloys and Compounds, 780. pp. 245-255. ISSN 0925-8388

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Indium tin oxide powders containing different amount of tin were prepared using a facile water based sol-gel procedure. The structural and microstructural properties have been analysed with X-ray diffractometer, FTIR-spectroscopy, XPS, TEM and EDX analysis. The nanocrystalline powders were used to fabricate Taguchi design based thick film sensors and their low concentration ammonia sensing (30 ppm) performance were evaluated in the operating temperature range of 200-400 degrees C. Indium tin oxide sensor having 20 wt% tin oxide showed the optimum response, similar to 61% for 30 ppm ammonia at operating temperature of 300 degrees C. Pd incorporation led to a significant enhancement in sensing response (similar to 82%) at the same condition. A good sensing response (similar to 43%) was also observed even at very low similar to 3 ppm of ammonia concentration. The interference of other gases was almost insignificant. The sensor was stable as reflected from the observation of negligible decrease in the sensing performance of sample up to 90 days period. The sensing mechanism for enhancement has also been explained. (C) 2018 Elsevier B.V. All rights reserved.

Item Type: Article
Subjects: Electronics
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 15 Nov 2019 07:42
Last Modified: 15 Nov 2019 07:42
URI: http://cgcri.csircentral.net/id/eprint/4615

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