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    • Keywords


      Thermal diffusivity; composite material; cryogenic temperature; phase difference; modified Angstrom method.

    • Abstract


      Modified Angstrom method is applied to study the variation of thermal diffusivity of plain woven fabric composite in closed cycle cryo-refrigerator (CCR) based set up in the temperature range 5–300 K. The set up used is plug in type and its small size offers portability. The set up works without use of any liquid cryogen. The temperature versus thermal diffusivity curve shows three distinct regions viz. 5–30 K, 30–120 K and 120–300 K. In the first region thermal diffusivity varies exponentially and rapidly. In the second region thermal diffusivity changes exponentially but relatively slowly than that in the first region. In the last region the change in thermal diffusivity with temperature is exponential in nature but very slow.

    • Author Affiliations


      Kalobaran Das1 S M Kamaruzzaman1 Tapas Ranjan Middya1 Siddhartha Datta2

      1. Department of Physics, Jadavpur University, Kolkata 700 032, India
      2. Department of Chemical Engineering, Jadavpur University, Kolkata 700 032, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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