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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/2419

Title: Photoacoustic Thermal Characterization of Porous Rare-Earth Phosphate Ceramics
Authors: Sajan, D George
Rajesh, K
Warrier, K G K
Radhakrishnan, P
Nampoori, V P N
Vallabhan, C P G
Technology
Keywords: photoacoustic
porosity
rare-earth phosphate ceramics
thermal diffusivity.
Issue Date: 29-Oct-2011
Abstract: The laser induced non-destructive photoacoustic technique has been employed to measure the thermal diffusivity of lanthanum phosphate ceramics prepared by the sol–gel route. The thermal diffusivity value was evaluated by knowing the transition frequency between the thermally thin to thermally thick region from the log–log plot of photoacoustic amplitude versus chopping frequency. Analysis of the data was carried out on the basis of the one-dimensional model of Rosencwaig and Gersho. The present investigation reveals that the sintering temperature has great influence on the propagation of heat carriers and hence on the thermal diffusivity value. The results were interpreted in terms of variations in porosity with sintering temperature as well as with changes in grain size.
URI: http://dyuthi.cusat.ac.in/purl/2419
Appears in Collections:Dr.C P Girijavallabhan

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