Application of Avrami’s Equation to the Conductivity Changes of Amorphous Selenium

  • M. K. El-Mously
  • F. E. Gani


The conductivity changes associated with the isothermal annealing of amorphous selenium are due mainly to crystallization. Direct measurements of these changes were conducted, and the experimental data was applied in Avrami’s equation in an attempt to evaluate the constant (n), which depends on the crystallization geometry. The crystallization constant (k), as well as the energy of crystallization (E) at different temperatures were calculated on the basis of the constant (n). For an average value of \(\bar n = 1.38\) the energy of crystallization was found to be 15.1 kcal/mol. The obtained fractional values of the constant (n) suggest that the crystallization of selenium is not a purely one dimensional process.


Crystallization Rate Isothermal Annealing Conductivity Change Equilibrium Thermodynamic State Normal Heating 


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  1. 1.
    M.K. El-Mously, Z.U. Borisova, Izv. Akad. Nauk SSSR. Neorg. Mater. 3, 92–93 (1967).Google Scholar
  2. 2.
    M.K. El-Mously, M. El-Zaidia, J. Noncryst. Solid (in press 1972).Google Scholar
  3. 3.
    J.N. Hay, Br. Polym. J. 3, 74–82 (1971).CrossRefGoogle Scholar
  4. 4.
    D. Turnbull, J.C. Fisher, J. Chem. Phys. 17, 71 (1949).CrossRefGoogle Scholar
  5. 5.
    D. Turnbull, Solid State Physics, Academic Press, New York (1956) 225–306.Google Scholar
  6. 6.
    W.E. Garner, Chemistry of the Solid State, Scientific Publica-tions, London (1955) ch. 7.Google Scholar
  7. 7.
    K.P. Mamedov and Z. Nurieva, Soviet Physics: Crystallography 12–4 605 (1968).Google Scholar
  8. 8.
    C.H. Chapness, R.H. Hoffmann, J. Noncryst. Solids 4 138–148 (1970).CrossRefGoogle Scholar
  9. 9.
    R.L. Myuller, Chemistry of Solid State, Izd. Leningrad State University, 18 (1965).Google Scholar

Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • M. K. El-Mously
    • 1
  • F. E. Gani
    • 1
  1. 1.Physics Department, Faculty of ScienceAin Shams UniversityCairoEgypt

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