In this work, we present a deepened study about the chemoresistivity properties of a commercial silicon carbide nanopowder. The material was characterized from the morphological, structural and chemical point of view. The powder was screen-printed onto alumina substrates in order to obtain a thick film. Afterwards, the layer was tested as functional material for chemoresistive gas sensors. The sensors were exposed to more than 10 gases with important chemical differences. The measurements showed an extreme selectivity of SiC sensors to SO2, in the range of ppm. This interesting result was found for quite high working temperatures (650°C). Furthermore, the electrical characterization with the tested gases showed an increase of the response and selectivity to SO2 in humidity condition.
Silicon Carbide: a Gas Sensing Material for Selective Detection of SO2
Gaiardo, Andrea;Bellutti, Pierluigi;Valt, M.;Pepponi, Giancarlo;
2016-01-01
Abstract
In this work, we present a deepened study about the chemoresistivity properties of a commercial silicon carbide nanopowder. The material was characterized from the morphological, structural and chemical point of view. The powder was screen-printed onto alumina substrates in order to obtain a thick film. Afterwards, the layer was tested as functional material for chemoresistive gas sensors. The sensors were exposed to more than 10 gases with important chemical differences. The measurements showed an extreme selectivity of SiC sensors to SO2, in the range of ppm. This interesting result was found for quite high working temperatures (650°C). Furthermore, the electrical characterization with the tested gases showed an increase of the response and selectivity to SO2 in humidity condition.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
