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Vol. 149, No. 2, February 2013, pp. 13-19




Ethanol Gas Sensing Properties of Nano-Porous LaFeO3 Thick Film


Dahiwadi College Dahiwadi, Tal. Man, Dist. Satara, (M. S.) 415508, India

Tel.: +91-2165-220231, fax: + 91-2165-220231

E-mail: sanjaykhetre@gmail.com



Received: 17 March 2012   /Accepted: 14 February 2013   /Published: 28 February 2013

Digital Sensors and Sensor Sysstems


Abstract: The characterization and ethanol gas sensing properties of nanoporous LaFeO3 thick films were investigated. Thick films of LaFeO3 were prepared by the screen printing technique. Thick films of nanoporous LaFeO3 were observed to be highly sensitive to ethanol vapours at 300 C. Upon exposure of ethanol vapours, the barrier height would decrease greatly leading to drastic increase in conductance. It is reported that the surface misfits and operating temperature can affect the microstructure and gas sensing performance of the sensor. The quick response and fast recovery are the main features of this sensor. The effects of microstructure and additive concentration on the gas response, selectivity, response time and recovery time of the sensor in the presence of ethanol vapours were studied and discussed.


Keywords: Nanoporous LaFeO3, XRD, SEM, TEM, Gas response


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