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>Thermal diffusivity measurements in the photoacoustic open-cell configuration using simple signal normalization techniques
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Thermal diffusivity measurements in the photoacoustic open-cell configuration using simple signal normalization techniques
A generalized model for the open photoacoustic cell configuration (OPC) technique, involving one-dimensional heat diffusion across two layers, is presented. The analytical results are particularly suitable for applications with dielectric solids, such as polymers and resins. Two effective normalization procedures for simple and reliable measurement of the thermal diffusivity of this kind of materials using an OPC are also presented. The thermal diffusivity of three different materials (a dental resin, an epoxy resin, and a polymer foil) was measured and excellent agreement was obtained with some values reported in the literature.
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Photothermal and Optoelectronic Diagnostics Laboratories (PODL), Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada M5R 3G8;