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Testing Method for the Johnson–Mehl–Avrami Equation in Kinetic Analysis of Crystallization Processes
Author(s) -
Málek Jiří,
Mitsuhashi Takefumi
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01523.x
Subject(s) - thermodynamics , crystallization , isothermal process , avrami equation , kinetic energy , logarithm , rate equation , materials science , kinetics , chemistry , mathematics , physics , mathematical analysis , crystallization of polymers , classical mechanics
The kinetics of crystallization processes in solids are usually described by the Johnson–Mehl–Avrami equation. One of the most popular methods to test the applicability of this equation is based on a double logarithmic plot of fraction crystallized (α). However, such plot is not very sensitive to small changes in α, and its reliability is rather limited. A simple and convenient testing method based on rate data (dα/d t ) is proposed. The method can be applied to virtually any type of kinetic data obtained under isothermal or nonisothermal conditions.