Thermal characterization of nanocrystalline porous CePO4 ceramics

Sajan D. George; Rajesh Komban; K. G K Warrier; P. Radhakrishnan; V. P N Nampoori; C. P G Vallabhan

doi:10.1080/14786430903246312

Thermal characterization of nanocrystalline porous CePO4 ceramics

Sajan D. George, Rajesh Komban, K. G K Warrier, P. Radhakrishnan, V. P N Nampoori, C. P G Vallabhan

Department of Atomic and Molecular Physics, Manipal

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A laser-induced photoacoustic technique was employed to investigate thermal transport through nanocrystalline CePO₄ samples prepared via the sol-gel route. Evaluation of thermal diffusivity was carried out using the one-dimensional model of Rosencwaig and Gersho for the reflection configuration of the photoacoustic method. Structural analyses of samples revealed that they are nanoporous in nature, possessing micron-sized grains. Analysis of results shows that thermal diffusivity value varies with sintering temperature. Results are explained in terms of the variation in porosity with sintering temperature and the effects of various scattering mechanisms on the propagation of phonons through the nanoporous ceramic matrix. Further analyses confirm that apart from porosity, grain boundary resistance and interface thermal resistance influence the effective value of thermal diffusivity of the samples under investigation.

Original language	English
Pages (from-to)	717-729
Number of pages	13
Journal	Philosophical Magazine
Volume	90
Issue number	6
DOIs	https://doi.org/10.1080/14786430903246312
Publication status	Published - 01-02-2010

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1080/14786430903246312

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abstract = "A laser-induced photoacoustic technique was employed to investigate thermal transport through nanocrystalline CePO4 samples prepared via the sol-gel route. Evaluation of thermal diffusivity was carried out using the one-dimensional model of Rosencwaig and Gersho for the reflection configuration of the photoacoustic method. Structural analyses of samples revealed that they are nanoporous in nature, possessing micron-sized grains. Analysis of results shows that thermal diffusivity value varies with sintering temperature. Results are explained in terms of the variation in porosity with sintering temperature and the effects of various scattering mechanisms on the propagation of phonons through the nanoporous ceramic matrix. Further analyses confirm that apart from porosity, grain boundary resistance and interface thermal resistance influence the effective value of thermal diffusivity of the samples under investigation.",

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AU - George, Sajan D.

AU - Komban, Rajesh

AU - Warrier, K. G K

AU - Radhakrishnan, P.

AU - Nampoori, V. P N

AU - Vallabhan, C. P G

PY - 2010/2/1

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N2 - A laser-induced photoacoustic technique was employed to investigate thermal transport through nanocrystalline CePO4 samples prepared via the sol-gel route. Evaluation of thermal diffusivity was carried out using the one-dimensional model of Rosencwaig and Gersho for the reflection configuration of the photoacoustic method. Structural analyses of samples revealed that they are nanoporous in nature, possessing micron-sized grains. Analysis of results shows that thermal diffusivity value varies with sintering temperature. Results are explained in terms of the variation in porosity with sintering temperature and the effects of various scattering mechanisms on the propagation of phonons through the nanoporous ceramic matrix. Further analyses confirm that apart from porosity, grain boundary resistance and interface thermal resistance influence the effective value of thermal diffusivity of the samples under investigation.

AB - A laser-induced photoacoustic technique was employed to investigate thermal transport through nanocrystalline CePO4 samples prepared via the sol-gel route. Evaluation of thermal diffusivity was carried out using the one-dimensional model of Rosencwaig and Gersho for the reflection configuration of the photoacoustic method. Structural analyses of samples revealed that they are nanoporous in nature, possessing micron-sized grains. Analysis of results shows that thermal diffusivity value varies with sintering temperature. Results are explained in terms of the variation in porosity with sintering temperature and the effects of various scattering mechanisms on the propagation of phonons through the nanoporous ceramic matrix. Further analyses confirm that apart from porosity, grain boundary resistance and interface thermal resistance influence the effective value of thermal diffusivity of the samples under investigation.

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Thermal characterization of nanocrystalline porous CePO4 ceramics

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