"Laser photoacoustics method for determination of the coefficients of thermal conductivity and thermal diffusivity of materials "
DOI:
https://doi.org/10.31489/2019No1/94-98Keywords:
photoacoustic method, thermal properties, thermal diffusivity and conductivity of materialsAbstract
In the article are given results of studies of laser photoacoustic for determination of the thermophysical properties of materials by the microphone detection circuits. It has been shown that the photoacoustic method for determining the thermophysical properties of materials, complementing other existing methods. The characteristic features of the application of the photoacoustic method based on the Rosencweig-Gersho fundamental theory are considered. The mathematical model of the problem for determining the thermal diffusivity of solid-state materials in one-dimensional and three-layer photoacoustic cell is developed. The proposed photoacoustic method can be successfully applied to the study of materials that are complex in structure, such as structurally inhomogeneous, multilayer, composite, powdery, nanomaterials, etc.
References
"1 Fokin V.M., Chernyshov V.N. Theoretical basis for determining the thermal diffusivity of building materials by non-destructive testing. Bulletin of TSTU. 2004, Vol. 10, No. 4A, pp. 936 – 945.
Chernyshov T.I. Methods and means of non-destructive testing of thermophysical properties of materials. Moscow, Mashinostroenie, 2001, 240 p[in Russian]
Zharov V.P., Letokhov V.S. Laser optical-acoustic spectroscopy. Moscow, 1984, 320p. [in Russian]
Mandelis A. Progress in Photothermal and Photoacoustic Science and Technology. V. 1. New York, Elsevier. 1992, 542 p.
Clider D. Supersensitive laser spectroscopy. Moscow, Mir. 1986. 520 p. [in Russian]
Rosencwaig А. Photoacoustics and Photoacoustic Spectroscopy, W., New York, 1980, 320p.
Madvaliev U. Development of new methods of photoacoustic spectroscopy of condensed matter. Diss. of the Dr. phys.- math. Sc., Moscow State University, Moscow, 2007, 302 p.
Rosencwaig A., Gersho A. Theory of the photoacoustic effect with solids. J. Appl. Phys. 1976, Vol.47, No. 1, pp. 64 – 69.
Vinokurov S.A. Determination of the optical and thermophysical characteristics of condensed media by an optoacoustical method. J. Applied Spectroscopy, 1985, Vol. 42, No. 1, pp. 1–11.
Zhuravlev V.E., Morozov A.I. et al. Photothermal determination of the thermophysical characteristics of solid-state objects. Inzhenerno-Fizicheskii Zhurnal. 1989, Vol. 56, No. 1, pp. 100 – 105.
Barros Melo W.L., Faria R.M. Photoacoustic procedure for measuring thermal parameters of transparent solids. Appl. Phys. Lett, 1995, Issue 67 (26), pp. 3892 – 3894.
Sharifov D.M., Mirzo A., Bekeshev A.Z., et al. Features of photoacoustic methods for studying the thermophysical properties of carbon nanocomposite polymeric materials. Bulletin of L.N. Gumilyov ENU, Astana, 2016, No. 6 (115), I - part, pp. 258 – 266.
Benedetto G., Maringelli M., Spagnolo R. Method for the absolute calibration of photoacoustic cells. Rev.Sci. Inctruments, 1987, Vol.58, No.6, pp. 977.
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