Effect of Calcination Temperature on Sensitivity of Tin Oxide Thin Film

Mishra, Sunita and Ghanshyam, C. and Ram, N. and Singh, Satinder and Bajpai, R.P. and Bhasin, K.K. and Bedi, R.K. (2003) Effect of Calcination Temperature on Sensitivity of Tin Oxide Thin Film. Journal of Scientific & Industrial Research, 62 (11). pp. 1063-1066. ISSN 0022-4456

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This paper describes the effect of calcination temperature on the gas sensitive properties of nanocrystalline tin oxide thin film. Nanocrystalline SnO2 thin films were prepared by sol-gel method using inorganic salt as aprecursor material. Influence of calcination temperature was evaluated on the structural morphology and electrical characteristic of the film prepared by spin coating method. Scanning Electron Microscopy (SEM) revealed that with increasing calcination temperature the uniformity of the film increased. X-ray diffraction (XRD) measurements showed that the grain size increased from ∼20 to 80 nm as the calcination temperature was increased from 100 to 600"C. In general, the preferred direction of smaller grain size is (110). At lower calcination temperatures, both the SnO2 peak and the SnO peaks were seen on XRD but only SnO2 peaks were observed at higher temperatures. The sensitivity of the tin oxide thin film to 500 ppm of alcohol vapors at the substrate temperature of 350"C was also grain size dependent. The sensitivity increased with decrease in grain size.

Item Type: Article
Uncontrolled Keywords: tin oxide; sensitivity; grain size; nanocrystalline; sol-gel; calcination temperature
Subjects: CSIO > Applied Physics
Depositing User: Ms. Narinder Kaur
Date Deposited: 04 Apr 2012 16:01
Last Modified: 10 Apr 2012 15:22
URI: http://csioir.csio.res.in/id/eprint/142

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