Journal of Świętokrzyskie Mountains Region
Series B – Natural Sciences
2009, No 30, 69–84
NANOCOMPOSITE MATERIALS – THERMAL PROPERTIES
AND APPLICATION FOR HYDROGEN DETECTORS
Key words: detector, nanostructural films, palladium nanograins
Interest in construction of new ecological (in meaning of ecological materials) detectors of gases and liquids arises in last years. Now researchers are looking for a solution for construction of detector which enables for faster detection and posses’ high sensitivity. The important feature of such detector should be its multi function. The interest in nanomaterials application in electronic devices grows in results of miniaturization and technical development.
Nanostructural films containing palladium nanograins synthesized in Tele & Radio Research Institute can be applied as active layer in hydrogen detector. Due to a complicated method of study of such nanostructural materials a mathematical modeling is often used for predictions of some properties of these materials. In this paper the structural model of the construction of film composed of palladium nanograins embedded in carbonaceous matrix was prepared on a base of previously obtained results of structural studies. Grate to these modeling the thermal properties of such film could be predicted. The modeling was done with Finite Element Method and ANSYS program (Ansys, Inc). The effects connected to convection at different temperature and their influences on temperature gradient in film volume were studied. The results of this modeling study showed in the places of Pd nanograins location the biggest temperature gradient. This effect is important because of its consequences connected to the film damage due to stress creation. This effect should be taken into consideration while the film is used in high temperature gas detectors.