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On the use and misuse of the avrami equation in characterization of the kinetics of fat crystallization
Author(s) -
Marangoni Alejandro G.
Publication year - 1998
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-998-0203-8
Subject(s) - avrami equation , exponent , crystallization , thermodynamics , mathematics , characterization (materials science) , polynomial , polynomial and rational function modeling , kinetics , materials science , mathematical analysis , crystallization of polymers , physics , linguistics , philosophy , quantum mechanics , nanotechnology
The Avrami model is widely used in the analysis of crystallization kinetic data. Unfortunately, the use of the original model has been abandoned in favor of modified versions. The modifications are largely arbitrary and create a dependence between the Avrami constant and the Avrami exponent. From a curve‐fitting point of view, no advantages exist in using the modified over the original form of the Avrami model. The order of a polynomial fit to crystallization data is not equivalent to the Avrami exponent. The use of turbidity measurements for the quantitative characterization of crystallization kinetics is not valid.