Aliovalent Yttrium Added Silver Sulphate: A Promising Candidate For SO2 Gas Sensor
S.W. Anwane, R.S. Anwane
Volume 3, Issue 2, Page 77-81 | DOI: 10.5185/amlett.2012.1314
Keywords: Electrochemical gas sensors, SO2 detectors, fast ionic conductors, sulphate based solid electrolytes, galvanic sensors, environmental pollution
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. Copyright © 2012 VBRI Press.