Photoacoustic procedure for measuring thermal parameters of transparent solids
作者:
W. L. Barros Melo,
R. M. Faria,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 67,
issue 26
页码: 3892-3894
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.115308
出版商: AIP
数据来源: AIP
摘要:
An application of photoacoustic technique is developed for determining the thermal diffusivity coefficient and the thermal conductivity of transparent materials. The backing material which supports the sample is made optically opaque, i.e., it entirely absorbs the incident light, and the converted heat diffuses through the sample heating the gas in contact with its opposite surface. The method is illustrated by fitting voltage amplitude and phase signals versus the chopping frequency in the photoacoustic cell, according to a theoretical model of heat diffusion. Thermal parameters obtained for three polymers compare very well with results from the literature. ©1995 American Institute of Physics.
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