Photothermal model fitting in the complex plane for thermal properties determination in solids
作者： M. A. Zambrano-Arjona , F. Peñuñuri , M. Acosta , I. Riech , R. A. Medina-Esquivel
DOI: 10.1063/1.4790433
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摘要: Thermal properties of solids are obtained by fitting the exact complex photothermal model to normalized photoacoustic (PA) signal in front configuration. Simple closed-form expressions for amplitude and phase presented all frequency ranges. In it has been common practice assume that absorptions radiation take place sample. However, order obtain accurate thermal is necessary consider PA contributions produced at cell walls. Such were considered our study. To demonstrate usefulness proposed methodology, commercial stainless steel layers AISI 302 analyzed. It shown using approach diffusivity effusivity good agreement with those reported literature. Also, a detailed procedure calculation standard error discussed.
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