Measurement of thermal diffusivity based on the photothermal displacement technique using new phase method

Eunho Lee; Kwangjai Lee; Pilsoon JeonJaisuk YooKi-hyun Kim

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Measurement of thermal diffusivity based on the photothermal displacement technique using new phase method

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摘要

A new analysis method of measuring the thermal diffusivity of a solid using photothermal displacement is proposed. To obtain an expression for the photothermal deformation, a homogeneous and isotropic infinite plate of finite thickness with stress-free boundaries is considered. Theoretical study was carried out to investigate the influence of the parameters, such as the radius and modulation frequency of the pump beam and the sample thickness. We obtained the thermal diffusivity from the phase of the signal by two methods. The first method for finding the thermal diffusivity of the theoretical result uses the bi-section method to minimize the standard deviation between experimental and theoretical phase curves. The second method uses the relation between the normalized thermal diffusion length and normalized minimum position. The experimental data obtained by applying these methods for different samples were in good agreement with the literature values.

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《JSME International Journal, Series B. Fluids and Thermal Engineering》 |2000年第4期|694-699|共6页
作者
Eunho Lee; Kwangjai Lee; Pilsoon JeonJaisuk YooKi-hyun Kim;
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正文语种英语
中图分类机械学（机械设计基础理论）;能源与动力工程;
关键词
Thermal diffusivity; Photothermal displacement; Thermal diffusion length; Pump beam; Probe beam; Phase angle;

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专利

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机译：Method for thermal diffusivity measurements based on photothermal deflection
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机译：Photothermal displacement technique: A method to determine the variation of thermal conductivity versus temperature in silicon
3. Thermal diffusivity measurement using the mode-mismatched photothermal lens method [J] . Miguel Benitez, Aristides Marcano, Noureddine Melikechi Optical Engineering . 2009,第4期

机译：Thermal diffusivity measurement using the mode-mismatched photothermal lens method
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机译：A new design technique based on a suitable choice of rotor geometrical parameters to maximize torque and power factor in synchronous reluctance motors: part II -finite-element analysis and measurements
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6. Metodi Microbiologici Tradizionali e metodi molecolari per l'analisi degli integratori alimentari a base di o con probiotici per ujso umano (Microbiological and Molecular Methods for Analysis of Probiotic Based Food Supplements for Human Consumption). [R] . Aureli, P., Fiore, A., Scalfaro, C., 2008

机译：metodi microbiologici Tradizionali e metodi moleculeolari per l'analisi degli integratori alimentari a base di o con probiotici per ujso umano（microbiological and molecular methods for analysis of probiotic Based Food supplements for Human Consumption）。

Measurement of thermal diffusivity based on the photothermal displacement technique using new phase method

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