Title :
Temperature dependence of Co detection by SnO2: Pd sensitive films gas sensors
Author :
Bercu, M. ; Tomescu, A. ; Roescu, R. ; Moldovan, C.
Author_Institution :
Fac. of Phys., Bucharest Univ., Romania
Abstract :
The electrical response to CO partial pressure in dry and wet synthetic air was investigated in the range Of 200-650°C, for SnO2 and SnO2-Pd thick films. Two peaks of sensitivity where found at 200, respectively 500°C in the case of CO interaction with the surface of SnO2 exposed to dry atmosphere. The presence of water vapours induced an extra peak of sensitivity at 300°C for pure SnO2 sensors. The influence of Pd catalyst on CO detection has been studied in wet at humid atmosphere versus temperature.
Keywords :
catalysts; gas sensors; palladium; thin films; tin compounds; 200 to 650 degC; SnO2:Pd; catalyst; electrical response; gas sensors; humid atmosphere; sensitivity; water vapours; Atmosphere; Atmospheric measurements; Electric resistance; Electrical resistance measurement; Electrodes; Gas detectors; Inorganic materials; Physics; Temperature dependence; Temperature sensors;
Conference_Titel :
Semiconductor Conference, 2005. CAS 2005 Proceedings. 2005 International
Print_ISBN :
0-7803-9214-0
DOI :
10.1109/SMICND.2005.1558745
