JST  Vol.1 No.4 , December 2011
Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO3
In this paper zinc stannate (ZnSnO3) nanoparticles was synthesized by a chemical precipitation method. The synthesized samples were characterized using X-ray powder diffraction (XRD), Differential scanning calorimetry (DSC) and UV-Visible absorption spectroscopy. Sensing material was made as pellet by hydraulic press machine under uniform pressure of 616 MPa. Then the material was annealed at 600C. Surface morphologies of the samples were analyzed using Scanning electron microscopy (SEM) for pellet of different weight ratio annealed at 600C. The XRD pattern indicates that ZnSnO3 has a perovskite phase with an orthorhombic structure having minimum crystallite size 4 nm. Further, humidity sensing investigations of these sensing materials were done. Our result indicate that ZnSnO3 in form of pellet annealed at 600C for 1:4 weight ratio was most sensitive of humidity in comparison to pure SnO2 under same conditions. Maximum sensitivity of the sample was 3 GΩ/% RH which is better in comparison to pure SnO2. The results were reproducible up to ± 77% after 2 months of observations.

Cite this paper
nullR. Singh, A. Yadav and C. Gautam, "Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO3," Journal of Sensor Technology, Vol. 1 No. 4, 2011, pp. 116-124. doi: 10.4236/jst.2011.14016.
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