Modelling and simulation of abnormal behaviour of thick-film tin oxide gas sensors in CO

 
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Journal part (EN)
Scientific article (EN)
1994 (EN)
Modelling and simulation of abnormal behaviour of thick-film tin oxide gas sensors in CO (EN)
Skafidas, PD (EN)
Avaritsiotis, JN (EN)
Vlachos, DS (EN)
A new model is proposed that takes into account oxygen vacancies in tin oxide resistive-type, assuming that lattice oxygen modifies the rate of oxygen adsorption. Applying this hypothesis in a Monte Carlo simulation, effects observed in thick-film samples are explained. Morevoer, computational techniques have been used in order to simulate different thick-film structures, and the role of both surface coverage and reduction in the sensing mechanism is investigated. The simulation results are in good qualitative agreement with the experimental results obtained from our samples. In particular, phenomena like undershoot and overshoot of the sample's resistance, very long recovery times and poisoning of the sensor surface are discussed. © 1994. (EN)
journalArticle (EN)
Chemisorption (EN)
Computational methods (EN)
Oxygen (EN)
Oxide resistive type gas sensors (EN)
Thick films (EN)
Thick film tin oxide gas sensors (EN)
Carlo simulations (EN)
Oxygen absorption (EN)
Temperature profile desorption (EN)
Monte Carlo methods (EN)
Absorption (EN)
Semiconductor gas sensors (EN)
Modelling (EN)
Mathematical models (EN)
Carbon monoxide (EN)
Tin oxide gas sensors (EN)
Monte Carlo simulation (EN)
Gas detectors (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά
Sensors and Actuators: B. Chemical (EN)
1994 (EN)
http://hdl.handle.net/123456789/11277
121 (EN)
2 (EN)
109 (EN)
09254005 (EN)
10.1016/0925-4005(94)80012-X (EN)
21 (EN)



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