An Example of Kinetic Modeling

Nucleation and growth processes such as glass crystallization generally follow the Johnson-Mehl-Avrami (JMA) model  

An isothermal experiment on the DTA/DSC can be run in which the sample temperature is quickly brought up into a temperature regime of interest and held during the crystallization transformation. Determining the fraction transformed as a function of time from partial areas under the DTA/DSC peak was described in section 3.2. 

The above equation can be rearranged into the equation of a line  

The rate constant is generally taken to have an Arrhenius temperature dependence  

Experimental methods involving rapid heating followed by isothermal crystallization become difficult to realize at higher 

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