Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

The sensing response of pure and SnO 2 activated Cr 2 O 3 to ethanol vapours and liquefied petroleum gas (LPG) has been investigated. Fine particles of commercial chromium oxide powder were selected and deposited as thick film to act as a gas sensor. The sensor surface has been activated by tin diox...

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Bibliographic Details
Published in:Bulletin of materials science 2010-10, Vol.33 (5), p.575-579
Main Authors: Singh, Ravi Chand, Kohli, Nipin, Singh, Manmeet Pal, Singh, Onkar
Format: Article
Language:English
Subjects:
Activated
Chemistry and Materials Science
Chlorides
Chromium oxides
Engineering
Ethanol
Ethyl alcohol
Gas sensors
Liquefied gases
Liquefied petroleum gas
LPG
Materials Science
Operating temperature
Oxidation
Tin chloride
Tin dioxide
Tin oxides
Vapour
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Summary:The sensing response of pure and SnO 2 activated Cr 2 O 3 to ethanol vapours and liquefied petroleum gas (LPG) has been investigated. Fine particles of commercial chromium oxide powder were selected and deposited as thick film to act as a gas sensor. The sensor surface has been activated by tin dioxide, on surface oxidation of tin chloride. The concentration of tin chloride solution, used as activator, was varied from 0 to 5% and its effect on gas response, selectivity and operating temperature has been studied. It was found that response to ethanol vapours significantly improved, whereas response to LPG remained unaffected. Moreover, operating temperature remains unchanged both for LPG and ethanol vapours.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-010-0088-7