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Type: Artigo de periódico
Title: Photoacoustic Measurement Of Thermal Diffusivity Of Polymer Foils
Author: Leite N.F.
Cella N.
Vargas H.
Miranda L.C.M.
Abstract: The photoacoustic measurement of polymer foils, typically 170-200 μm thick, is discussed. It is shown that the measurement based upon the phase lag between the front and rear illuminations is applicable only in a limited range of frequencies from 6 to 12 Hz. The dominant mechanism responsible for the photoacoustic signal, in almost the entire frequency range 10-100 Hz, is proven to be the thermoelastic bending of the foil samples. The thermal diffusivity is then obtained from the frequency dependence of the front-phase illumination data.
Citation: Journal Of Applied Physics. , v. 61, n. 8, p. 3025 - 3027, 1987.
Rights: aberto
Identifier DOI: 10.1063/1.337853
Date Issue: 1987
Appears in Collections:Unicamp - Artigos e Outros Documentos

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