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Vol. 104, Issue 5, April 2009, pp.68-75





Fe2O3 - ZnO Based Gas Sensors



Nanomaterials Research Lab, Dept of Physics, Pratap College Amalner

E-mail: plalchand_phy_aml@yahoo.co.in



Received: 18 February 2009   /Accepted: 19 May 2009   /Published: 25 May 2009


Abstract: Thick films of pure ZnO, Fe2O3 added ZnO and Fe2O3 modified ZnO were prepared by screen printing technique. Gas sensing performances of these films were tested for NH3, LPG, CO2, C2H5OH, H2 and Cl2. All these films were observed to be highly or most sensitive to NH3. Gas response profiles along with the response and recovery times of the sensors are presented. Structural, microstructural and elemental analysis were carried out. The effects of microstructure and surface misfits on the sensitivity, selectivity, response and recovery of the sensor were studied and discussed.


Keywords: Pure ZnO, Fe2O3 added ZnO, Fe2O3 modified ZnO, NH3-gas sensor, Gas response, Selectivity, Response time, Recovery time


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