Aliovalent Yttrium Added Silver Sulphate: A Promising Candidate For SO2 Gas Sensor

S.W. Anwane1*, R.S. Anwane2

1Department of Physics, Shri Shivaji Science College, Congress Nagar, Nagpur 440012, India

2Department of Applied Physics, TGP College of Engineering and Technology, Mohagaon, Nagpur, India

Adv. Mater. Lett., 2012, 3 (2), pp 77-81

DOI: 10.5185/amlett.2012.1314

Publication Date (Web): Apr 14, 2012

E-mail: swanwane2000@yahoo.com

Abstract


Optimum alio-valent doping with yttrium sulphate creating 7% vacancy concentration provided promising features from sensor application view. This provides a better option over green Silver Sulphate. The sensors fabricated with the modified sulphate based silver ion conducting solid electrolyte, silver-silver sulphate reference electrode and test gas (Pt) electrodes has been tested over the range of 50-1000 ppm SO2 blended in constant oxygen-partial pressure and argon at 400oC. A promising sensor characteristic behaviour is exhibited by the modified electrolyte - solid solution of silver sulphate with yttrium.

Keywords

Electrochemical gas sensors, SO2 detectors, fast ionic conductors, sulphate based solid electrolytes, galvanic sensors, environmental pollution

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