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Controlling the Crystallization Kinetics of Amorphous Se82In18 Chalcogenide Glass |
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PP: 49-54 |
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Author(s) |
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A. M. Abd Elnaeim,
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Abstract |
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| The present work deals with the accurately determination of the activation energy of crystallization (Ec), the frequency factor (Ko), the reaction order (n) without any approximation for amorphous Se82In18glass. Both the Ec and Ko values were determined using Afify, Augis and Bennett and Kissinger methods. In comparison between the three methods one can note that, Kissinger’s method isn’t suitable to determine k0. This is because that, the Ko(Kissinger) is too small compared with that determined by Afify or Augis and Bennett’s method. Using theEc and Kovalues the overall reaction rate (K)has been calculated as a function of temperature. Where k and t is already known then Avrami’s equation can be solved for the unknown quantity which is the reaction order (n) as well as recently published. Unlike other methods such as Afify, Augis and Bennett’s and others, this method helps one to determine n value without any approximations. The calculated values of the crystallization fraction ,Xth, are in excellent agreement with that determined using the partial area techniqueeie experimentally determined, Xexp. |
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