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Prof. Ashutosh Tiwari, Editor-in-Chief has been honoured Scientists with Adv Mater Lett Award 2013.

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LPG Sensing Properties Of Platinum Doped Nanocrystalline SnO2 based Thick Films With Effect Of Dipping Time And Sintering Temperature

A.D. Garje, S.N. Sadakale

Volume 4, Issue 1, Page 58-63 | DOI: 10.5185/amlett.2013.icnano.228

Keywords: Thick film; LPG sensor; Pt doping; SnO2.

Abstract: 

Synthesized nanophase SnO2 powder is used to fabricate thick film resistors using screen printing technology. The surfaces of the thick film resistors were modified by dip coating in platinum chloride (PtCl2) solution of optimized 1.5 M for different time periods of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 minutes. Sintering of the films is carried out at different temperatures of 550, 600, 650, 700, 750 and 800°C. The films were tested for 400 ppm of LPG. Thick films which were dip coated for 5 minutes and sintered at 750oC show the highest sensitivity towards LPG which is ten times higher than undoped SnO2 sensors. The characterization of the sensors was done using XRD, EDX and SEM. The sensors were found to be extremely stable and repeatable with a response and recovery time of 10 and 22 s with a minimum detection limit of 5 ppm of LPG. Copyright © 2013 VBRI Press

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