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 journalArticle

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

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Photoacoustic effect
Thermal diffusivity
thermal diffusivity
Nanocomposites
nanocomposites
ceramics
heat
Aluminum Oxide
Electron transitions
heat transmission
sintering
Alumina
Sintering
aluminum oxides
Porosity
Heat transfer
porosity
Atoms
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Materials Chemistry

Cite this

George, S. D., Anappara, A. A., Warrier, P. R. S., Warrier, K. G. K., Radhakrishnan, P., Nampoori, V. P. N., & Vallabhan, C. P. G. (2008). Photoacoustic thermal characterization of Al2O3-Ag ceramic nanocomposites. Materials Chemistry and Physics, 111(1), 38-41. https://doi.org/10.1016/j.matchemphys.2008.03.009
George, Sajan D. ; Anappara, Aji A. ; Warrier, P. R S ; Warrier, K. G K ; Radhakrishnan, P. ; Nampoori, V. P N ; Vallabhan, C. P G. / Photoacoustic thermal characterization of Al2O3-Ag ceramic nanocomposites. In: Materials Chemistry and Physics. 2008 ; Vol. 111, No. 1. pp. 38-41.
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George, SD, Anappara, AA, Warrier, PRS, Warrier, KGK, Radhakrishnan, P, Nampoori, VPN & Vallabhan, CPG 2008, 'Photoacoustic thermal characterization of Al2O3-Ag ceramic nanocomposites', Materials Chemistry and Physics, vol. 111, no. 1, pp. 38-41. https://doi.org/10.1016/j.matchemphys.2008.03.009

Photoacoustic thermal characterization of Al2O3-Ag ceramic nanocomposites. / George, Sajan D.; Anappara, Aji A.; Warrier, P. R S; Warrier, K. G K; Radhakrishnan, P.; Nampoori, V. P N; Vallabhan, C. P G.

In: Materials Chemistry and Physics, Vol. 111, No. 1, 15.09.2008, p. 38-41.

Research output: Contribution to journalArticle

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George SD, Anappara AA, Warrier PRS, Warrier KGK, Radhakrishnan P, Nampoori VPN et al. Photoacoustic thermal characterization of Al2O3-Ag ceramic nanocomposites. Materials Chemistry and Physics. 2008 Sep 15;111(1):38-41. https://doi.org/10.1016/j.matchemphys.2008.03.009