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Vol. 104, Issue 5, April 2009, pp.87-95





Liquefied Petroleum Gas (LPG) Sensing Properties of Nanosized Sprayed CdIn2O4 Thin Films



Electrochemical Materials Laboratory, Department of Physics, Shivaji University,

Kolhapur- 416 004, Maharashtra, India

Tel.: +91231-2609435, 9960012878, *+91-231-2609228, *fax: +91-231-2691533

E-mail: deokate2000@yahoo.co.in, rajpure@yahoo.com



Received: 24 March 2009   /Accepted: 19 May 2009   /Published: 25 May 2009


Abstract: The liquefied petroleum gas (LPG) sensing properties based on sprayed cadmium indium oxide (CdIn2O4) thin films were studied. The as-deposited films were annealed at 400 oC for 2 h in air atmosphere and studied structurally by SEM and TEM techniques. The annealed films are of CdIn2O4 with cubic spinel structure. Average particle size estimated from TEM analysis was observed to be 10-15 nm. Experiments with LPG at concentration levels of 400-1200 ppm and at operating temperatures ranging from 375-425 oC were performed. The maximum gas response of 26 % to 100 ppm of LPG at 400 oC achieved. At this temperature the response and recovery times were about 82 and 64 s, respectively. Improved gas response to relatively low LPG concentration was assigned to nanocrystalline nature of the deposits.


Keywords: Cadmium indium oxide, Thin films, Spray pyrolysis, X-ray diffraction, LPG sensor


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