Laser-induced thermal characterization of nano Ag metal dispersed ceramic alumina matrix

Sajan D. George; Aji A. Anapara; K. G. K. Warrier; P. Radhakrishnan; C. P. G. Vallabhan; V. P. N. Nampoori

doi:10.1117/12.499026

29 April 2003 Laser-induced thermal characterization of nano Ag metal dispersed ceramic alumina matrix

Sajan D. George, Aji A. Anapara, K. G. K. Warrier, P. Radhakrishnan, C. P. G. Vallabhan, V. P. N. Nampoori

Proceedings Volume 5118, Nanotechnology; (2003) https://doi.org/10.1117/12.499026
Event: Microtechnologies for the New Millennium 2003, 2003, Maspalomas, Gran Canaria, Canary Islands, Spain

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.

Citation Download Citation

Sajan D. George, Aji A. Anapara, K. G. K. Warrier, P. Radhakrishnan, C. P. G. Vallabhan, and V. P. N. Nampoori "Laser-induced thermal characterization of nano Ag metal dispersed ceramic alumina matrix", Proc. SPIE 5118, Nanotechnology, (29 April 2003); https://doi.org/10.1117/12.499026

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