Title :
Gas sensing properties of mixed α Fe2O3-SnO2 nanoparticles prepared under hydrothermal conditions
Author :
Tomescu, A. ; Roescu, R. ; Dumitriu, I. ; Tarabasanu-Mihaila, D.
Author_Institution :
National Inst. of Material Phys., Bucharest-Magurele, Romania
Abstract :
This paper reports an investigation of the gas-sensitive properties of thick film sensors based on mixed nanosized oxides (1-x)αFe2O3-xSnO2 (x = 0.1-1.0), towards different reducing gases (CH4, CO, H2O). The samples were tested in the range of temperatures (200-400°C). The mixed oxides proved a real sensitivity to CH4 being practically insensitive to detection limit of CO. The maximum response to CH4 takes place at 330°, where the water interference was also studied.
Keywords :
carbon compounds; gas sensors; iron compounds; nanocomposites; nanoparticles; thick film devices; tin compounds; water; (1-x)αFe2O3-xSnO2; 200 to 400 C; 330 C; CH4; CO; Fe2O3; H2O; SnO2; gas detection limit; gas sensing properties; gas sensitivity; gas sensor; gas-sensitive properties; hydrothermal conditions; mixed α Fe2O3-SnO2 nanoparticles; mixed metal oxides; mixed nanosized oxides; nanosized composite; reducing gases; thick film sensors; water interference; Charge transfer; Chemical sensors; Electrons; Gas detectors; Gases; Iron; Nanoparticles; Powders; Substrates; Tin;
Conference_Titel :
Semiconductor Conference, 2004. CAS 2004 Proceedings. 2004 International
Print_ISBN :
0-7803-8499-7
DOI :
10.1109/SMICND.2004.1402816
