Photoacoustic thermal characterization of Al2O3-Ag ceramic nanocomposites

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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Laser-induced nondestructive photoacoustic (PA) technique has been employed to determine the thermal diffusivity of nanometal (Ag) dispersed ceramic alumina matrix sintered at different temperatures. The thermal diffusivity values are evaluated by knowing the transition frequency from the amplitude spectrum of PA signal using the one-dimensional heat flow model of Rosencwaig and Gersho. Analysis of the data shows that heat transport and hence the thermal diffusivity value is greatly affected by the influence of incorporation of foreign atom. It is also seen that sintering temperature affects the thermal diffusivity value in a substantial manner. The results are interpreted in terms of variation in porosity and carrier-assisted heat transport mechanism in nanometal dispersed ceramics.

Original languageEnglish
Pages (from-to)38-41
Number of pages4
JournalMaterials Chemistry and Physics
Volume111
Issue number1
DOIs
Publication statusPublished - 15-09-2008

All Science Journal Classification (ASJC) codes

  • Materials Chemistry

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