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Proceedings Paper

Laser-induced thermal characterization of nano Ag metal dispersed ceramic alumina matrix
Author(s): Sajan D. George; Aji A. Anapara; K. G. K. Warrier; P. Radhakrishnan; C. P. G. Vallabhan; V. P. N. Nampoori
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Paper 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.

Paper Details

Date Published: 29 April 2003
PDF: 6 pages
Proc. SPIE 5118, Nanotechnology, (29 April 2003); doi: 10.1117/12.499026
Show Author Affiliations
Sajan D. George, Cochin Univ. of Science and Technology (India)
Aji A. Anapara, Council of Science and Industrial Research (India)
K. G. K. Warrier, Council of Science and Industrial Research (India)
P. Radhakrishnan, Cochin Univ. of Science and Technology (India)
C. P. G. Vallabhan, Cochin Univ. of Science and Technology (India)
V. P. N. Nampoori, Cochin Univ. of Science and Technology (India)


Published in SPIE Proceedings Vol. 5118:
Nanotechnology
Robert Vajtai; Xavier Aymerich; Laszlo B. Kish; Angel Rubio, Editor(s)

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