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Measurement of Thermal Diffusivity Using Minimum Phase Based on the Photothermal Displacement
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 Title & Authors
Measurement of Thermal Diffusivity Using Minimum Phase Based on the Photothermal Displacement
Lee, Eun-Ho; Lee, Gwang-Jae; Jeon, Pil-Su; Yu, Jae-Seok; Kim, Gi-Hyeon;
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A new method of measuring the thermal diffusivity of solid material at room temperature using photothermal displacement is proposed. The influence of the parameters, such as radius and modulation frequency of the pump beam and the sample thickness, was studied. From the minimum position of phase of measured deflection with respect to the pump beam, the thermal diffusivity of the materials can be obtained. The position where phase has the minimum value is determined using multiparameter least-square regression fitting. The experimental values for different samples obtained by applying the new method are in good agreement with the literature values.
Photothermal Displacement Method;Thermal Diffusivity;Phase Angle;Deformation Gradient;Thermal Diffusion Length;
 Cited by
광열변위법의 변형각을 이용한 열확산계수 측정,전필수;이광재;유재석;박영무;이종화;

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