International Journal of Scientific Engineering and Technology

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Development of Pd-Doped SnO2 Thick Film Paste for Gas Sensor


Affiliations
1 Department of Electronics Engineering, Sir Padampat Singhania University, Udaipur, India
 

In the present work effort has been made to develop the thick film paste for gas sensor. In the first step glass powder has been prepared and then SnO2 powder was synthesized. In the next step Pd-doping has been done and finally thick film SnO2 sensor was fabricated on a 1˝x1˝ alumina substrate. It consists of a gas sensitive layer (SnO2) doped with Pd, a pair of electrodes in array form underneath the gas sensing layers serving as a contact pad for sensor and a common heater element on the backside of the substrate. Alumina substrate (96%) has been used as a substrate for sensor fabrication. The fabricated sensor was tested for varying concentration of ethanol in a locally developed test chamber. The response of the sensor for varying concentration of ethanol tested the sensitivity of the sensor for ethanol.
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  • Development of Pd-Doped SnO2 Thick Film Paste for Gas Sensor

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Authors

Preeti Pandey
Department of Electronics Engineering, Sir Padampat Singhania University, Udaipur, India
J. K. Srivastava
Department of Electronics Engineering, Sir Padampat Singhania University, Udaipur, India
H. Purohit
Department of Electronics Engineering, Sir Padampat Singhania University, Udaipur, India

Abstract


In the present work effort has been made to develop the thick film paste for gas sensor. In the first step glass powder has been prepared and then SnO2 powder was synthesized. In the next step Pd-doping has been done and finally thick film SnO2 sensor was fabricated on a 1˝x1˝ alumina substrate. It consists of a gas sensitive layer (SnO2) doped with Pd, a pair of electrodes in array form underneath the gas sensing layers serving as a contact pad for sensor and a common heater element on the backside of the substrate. Alumina substrate (96%) has been used as a substrate for sensor fabrication. The fabricated sensor was tested for varying concentration of ethanol in a locally developed test chamber. The response of the sensor for varying concentration of ethanol tested the sensitivity of the sensor for ethanol.