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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/1785

Title: Laser-induced thermal characterization of nano Ag metal dispersed ceramic alumina matrix
Authors: Girijavallabhan, C P
Radhakrishnan, P
Nampoori, V P N
Sajan, D George
Aji, A Anapara
K G K Warrier
Keywords: Photoacoustic
thermal properties
nano composite
Issue Date: 2003
Publisher: Proceedings of SPIE
Citation: International School of Photonics, Cochin University of Science and Technology
Abstract: In this paper, we report the measurements of thermal diffusivity of nano Ag metal dispersed ceramic alumina matrix sintered at different temperatures using laser induced non-destructive photoacoustic technique. Measurements of thermal diffusivity also have been carried out on specimens with various concentration of nano metal. Analysis of the data is done on the basis of one-dimensional model of Rosencwaig and Gersho. The present measurements on the thermal diffusivity of nano metal dispersed ceramic alumina shows that porosity has a great influence on the heat transport and the thermal diffusivity value. The present analysis also shows that the inclusion of nano metal into ceramic matrix increases its interconnectivity and hence the thermal diffusivity value. The present study on the samples sintered at different temperature shows that the porosity of the ceramics varies considerably with the change in sintering temperature. The results are interpreted in terms of phonon assisted heat transfer mechanism and the exclusion of pores with the increase in sintering temperature.
URI: http://dyuthi.cusat.ac.in/purl/1785
Appears in Collections:Dr.C P Girijavallabhan

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