Two heating rates as a method for calculating the kinetic parameters of crystallization in a glassy system
作者： M. S. Rasheedy
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摘要: Various experimental methods are currently employed for determining the kinetic parameters of crystallization in a glassy system. These include activation energy E(kJ/mol), Avrami exponent or reaction order (n) and frequency factor K0 (s–1). In present work, new method is derived from Johnson–Mehl–Avrami (JMA) equation to calculate crystallization. The starts with E. depends on obtaining same vol-ume fraction x(t) at two heating rates. Next, n K0 determined successively. straightforward involves no assumptions addition those involved JMA equation. technique has successfully predicted Ge10Te35As55 glasses during non-isothermal annealing. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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