TITLE

Thermophysical property measurements using time-resolved photothermal deflection spectrometry with step optical excitation

AUTHOR(S)
Jianhua Zhao; Jainqin Zhou; Shen, Jun
PUB. DATE
June 2004
SOURCE
Applied Physics Letters;6/28/2004, Vol. 84 Issue 26, p5332
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This letter reports the theoretical and experimental results of thermophysical property measurements using our recently developed time-resolved photothermol deflection spectrometry (PDS) with step optical excitation. One-dimensional heat conduction boundary conditions of the third kind were derived, and a theoretical model with the boundary conditions was proposed. Both thermal diffusivity and effusivity of two well-known samples were precisely measured simultaneously by fitting experimental data to the theory. Thermal conductivity and unit volume specific heat then can be deduced. Moreover, time-resolved PDS with step optical excitation has the advantages of simpler experimental apparatus and less time consuming measurement, compared with the traditional periodically modulated PDS.
ACCESSION #
13495706

 

Related Articles

  • Frequency domain photothermal radiometry with spherical solids. Wang, Chinhua; Liu, Yue; Mandelis, Andreas; Shen, Jun // Journal of Applied Physics;4/15/2007, Vol. 101 Issue 8, p083503 

    Motivated by increasing practical and industrial applications of photothermal techniques in the measurement of materials of various shapes with curvature, we extend the applications of photothermal diagnostics to solid spheres, in which both theoretical and experimental photothermal radiometry...

  • Simultaneous measurement of thermal diffusivity and optical absorption coefficient using photothermal radiometry. I. Homogeneous solids. Fuente, Raquel; Apiñaniz, Estibaliz; Mendioroz, Arantza; Salazar, Agustín // Journal of Applied Physics;Aug2011, Vol. 110 Issue 3, p033515 

    Modulated photothermal radiometry (PTR) has been widely used to measure the thermal diffusivity of bulk materials. The method is based on illuminating the sample with a plane light beam and measuring the infrared emission with an infrared detector. The amplitude and phase of the PTR voltage is...

  • Method for thermal diffusivity measurements based on photothermal deflection. Bertolotti, M.; Liakhou, G.; Li Voti, R.; Michelotti, F.; Sibilia, C. // Journal of Applied Physics;12/15/1993, Vol. 74 Issue 12, p7078 

    Presents information on a study which discussed the thermal diffusivity measurement through pulsed photodeflection in a modified collinear configuration. Methods; Results; Discussion.

  • A cryostatic setup for the low-temperature measurement of thermal diffusivity with the... Bertolotti, M.; Liakhou, G.; Li Voti, R.; Paoloni, S.; Sibilia, C.; Sparvieri, N. // Review of Scientific Instruments;Dec1995, Vol. 66 Issue 12, p5598 

    Describes a cryostatic setup to perform photothermal deflection measurements from room temperature. Use of gaseous nitrogen as a medium where the photodeflection is produced; Sample application to high-temperature superconductors and yttrium-iron garnets.

  • Reply to 'Comments on 'The photothermal method applied to low thermal diffusivity measurements''... Bertolotti, M.; Li Voti, R.; Liakhou, G.; Sibilia, C. // Review of Scientific Instruments;Jan1995, Vol. 66 Issue 1, p277 

    Explains the findings of a paper on photothermal method applied to low thermal diffusivity measurements evaluated by critics in the 1995 issue of the periodical 'Review of Scientific Instruments.'

  • New methodology for thermal parameter measurements in solids using photothermal radiometry. Depriester, M.; Hus, P.; Delenclos, S.; Sahraoui, A. Hadj // Review of Scientific Instruments;Jul2005, Vol. 76 Issue 7, p074902 

    The photothermal radiometry (PTR) signal is analyzed in order to simultaneously obtain the thermal diffusivity and effusivity of solid materials. Analytical procedures that allow the determination of the thermal parameters via a frequency scan of the amplitude or the phase of the PTR signal are...

  • Photothermal Radiometry with Solid Cylindrical Samples. Wang, Chinhua; Mandelis, Andreas; Liu, Yue // Journal of Applied Physics;10/1/2004, Vol. 96 Issue 7, p3756 

    We extend the applications of the photothermal diagnostics by means of laser-infrared photothermal radiometry (PTR) to samples with curved surfaces. Specifically, we present both the theoretical and experimental PTR studies on solid cylindrical samples (surfaces). Based on the Green function...

  • A travelling photothermal technique employing pyroelectric detection to measure thermal diffusivity of films and coatings. Philip, J.; Manjusha, M. V.; Soumya, H. // Review of Scientific Instruments;Oct2011, Vol. 82 Issue 10, p104901 

    A travelling thermal wave technique employing optical excitation and pyroelectric detection of thermal waves propagating along a material film/coating on a substrate is described. The method enables direct measurement of thermal diffusivity. The technique involves measurement of the phase lag...

  • The strong influence of heat losses on the accurate measurement of thermal diffusivity using lock-in thermography. Salazar, Agustín; Mendioroz, Arantza; Fuente, Raquel // Applied Physics Letters;9/21/2009, Vol. 95 Issue 12, p121905 

    In modulated photothermal experiments the lateral thermal diffusivity can be obtained from the slope of the linear relation between the phase of the surface temperature and the distance to the heating spot. However, this slope is greatly affected by heat losses so that the measured thermal...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics