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

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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 languageEnglish
Pages (from-to)717-729
Number of pages13
JournalPhilosophical Magazine
Issue number6
Publication statusPublished - 01-02-2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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