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Journal of thermal analysis

, Volume 46, Issue 6, pp 1697–1703 | Cite as

Measurement of thermophysical properties of ammonium salts in the solid and molten states

  • M. B. S. Osman
  • A. Z. Dakroury
  • M. T. Dessouky
  • M. A. Kenawy
  • A. A. El-Sharkawy
Article

Abstract

The thermal conductivity, specific heat capacity and thermal diffusivity of solid and molten ammonium thiocyanate, ammonium formate, ammonium acetate and ammonium nitrate were measured in the temperature range 80–190‡C, including the solid and liquid phases, by using the AC-heated strip (wire) technique. The results indicate that the thermal conductivities depend on the type of the ammonium salt. It was found that the mechanism of heat transfer is due to phonons in the region below the melting points of the salts, while above this region the main mechanism is due to conduction.

Keywords

ammonium salts 

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References

  1. 1.
    Y. Kato, K. Furukawa, N. Araki and K. Kobayasi, High Temp.-High Press., 15 (1983) 191.Google Scholar
  2. 2.
    N. Araki, M. Matsuura, A. Makino, T. Hirata and Y. Kato, Int. J. Thermophys., 9 (1988) 1071.CrossRefGoogle Scholar
  3. 3.
    N. Araki and K. Kobayasi, Heat Trans., 14 (1985) 56.Google Scholar
  4. 4.
    S. R. Atalla, A. A. El-Sharkawy and F. A. Gasser, Int. J. Thermophys., 2 (1981) 155.CrossRefGoogle Scholar
  5. 5.
    A. Z. Dakroury, M. B. S. Osman and A. A. El-Sharkawy, Int. J. Thermophys., 11 (1990) 515.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó 1996

Authors and Affiliations

  • M. B. S. Osman
    • 2
  • A. Z. Dakroury
    • 2
  • M. T. Dessouky
    • 1
    • 2
  • M. A. Kenawy
    • 2
  • A. A. El-Sharkawy
    • 1
    • 2
  1. 1.Physics Department, Faculty of ScienceAl-Azhar UniversityNasr City, CairoEgypt
  2. 2.Physics Department, University College for WomenAin Shams UniversityHeliopolis, Cairo

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