Thermal diffusivity measurement of solid materials by the pulsed photothermal displacement technique

Bennis, G. L.; Vyas, Reeta; Gupta, R.; Ang, S. T.; Brown, W.D.

doi:10.1063/1.368535

Cited by 25 publications

(8 citation statements)

References 40 publications

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“…Diverse experimental techniques have been used to measure k [2,[7][8][9][10][11][12][13][14][15][16][17], employing methodologies, equipment, sample sizes, and experimental time scales that lend themselves differently to measurement capability, particularly for pharmaceutically relevant materials. Methods that utilize differential scanning calorimetry (DSC) instrumentation provide rapid measurement of k in the context of a common, commercially available instrument, ubiquitously present in pharmaceutical characterization laboratories.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity measurements for small molecule organic solid materials using modulated differential scanning calorimetry (MDSC) and data corrections for sample porosity

Lin

Shi

Wildfong

2010

Journal of Pharmaceutical and Biomedical Analysis

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Section: Introductionmentioning

confidence: 99%

Thermal conductivity measurements for small molecule organic solid materials using modulated differential scanning calorimetry (MDSC) and data corrections for sample porosity

Lin

Shi

Wildfong

2010

Journal of Pharmaceutical and Biomedical Analysis

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“…An alternative detection based on surface deformation can be used for material characterization of semitransparent and opaque materials. 19–29 Surface deformation occurs when an excitation laser beam irradiates a solid sample, resulting in expansion/contraction of the surface. A reflected probe laser is used to detect the deformation in the thermal mirror (TM) effect.…”

Section: Introductionmentioning

confidence: 99%

Combined Photothermal Lens and Photothermal Mirror Characterization of Polymers

et al. 2014

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We propose a combined thermal lens and thermal mirror method as concurrent photothermal techniques for the physical characterization of polymers. This combined method is used to investigate polymers as a function of temperature from room temperature up to 170 °C. The method permits a direct determination of thermal diffusivity and thermal conductivity. Additional measurements of specific heat, linear thermal expansion, and temperature-dependent optical path change are also performed. A complete set of thermal, optical, and mechanical properties of polycarbonate and poly (methyl methacrylate) samples are obtained. Methods presented here can be useful for in situ characterization of semitransparent materials, where fast and non-contacting measurements are required.

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“…They are powerful and accurate noncontact methods used to determine thermophysical properties. 1–3 In particular, photothermal displacement 4–9 and thermal mirror (TM) 10–17 techniques have been used to determine the structural, thermal, and optical properties of materials by exploiting the laser surface deformation that occurs upon laser-induced sample heating. Focusing an excitation laser on a solid material induces the effect.…”

Section: Introductionmentioning

confidence: 99%

Pulsed-Laser Time-Resolved Thermal Mirror Technique in Low-Absorbance Homogeneous Linear Elastic Materials

et al. 2013

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A theoretical model for a time-resolved photothermal mirror technique using pulsed-laser excitation was developed for low absorption samples. Analytical solutions to the temperature and thermoelastic deformation equations are found for three characteristic pulse profiles and are compared to finite element analysis methods results for finite samples. An analytical expression for the intensity of the center of a continuous probe laser at the detector plane is derived using the Fresnel diffraction theory, which allows modeling of experimental results. Experiments are performed in optical glasses, and the models are fitted to the data. The parameters of the fit are in good agreement with previous literature data for absorption, thermal diffusion, and thermal expansion of the materials tested. The combined modeling and experimental techniques are shown to be useful for quantitative determination of the physical properties of low absorption homogeneous linear elastic material samples.

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Thermal diffusivity measurement of solid materials by the pulsed photothermal displacement technique

Abstract: Temperature dependence of the thermal diffusivity of GaAs in the 100-305 K range measured by the pulsed photothermal displacement technique

Cited by 25 publications

References 40 publications

Thermal conductivity measurements for small molecule organic solid materials using modulated differential scanning calorimetry (MDSC) and data corrections for sample porosity

Thermal conductivity measurements for small molecule organic solid materials using modulated differential scanning calorimetry (MDSC) and data corrections for sample porosity

Combined Photothermal Lens and Photothermal Mirror Characterization of Polymers

Pulsed-Laser Time-Resolved Thermal Mirror Technique in Low-Absorbance Homogeneous Linear Elastic Materials

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