Kinetic
parameters determination in non-isothermal conditions for the crystallisation
of a silica-soda-lead glass |
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Authors: | Oana Cătălina Mocioiu Maria Zaharescu Georgeta Jitianu P Budrugeac |
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Institution: | (1) Institute of Physical Chemistry ‘I.G. Murgulescu’, Romanian Academy, Bucharest, Romania, 77208, Splaiul Independentei 202;(2) INCDIE- ICPE-CA Advanced Research Institute for Electrical Engineering, Bucharest-3, Romania, 030138, Splaiul Unirii 313 |
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Abstract: | Two integral isoconversional methods (Flynn–Wall–Ozawa and
Kissinger–Akahira–Sunose) and the invariant kinetic parameters
method (IKP) were used in order to examine the kinetics of the non-isothermal
crystallisation of a silica-soda-lead glass. The objective of the paper is
to show the usefulness of the IKP method to determine both the activation
parameters and the kinetic model of the investigated process. Thismethod associated
with the criterion of coincidence of kinetic parameters for all heating rates
and some procedures of the evaluation of the parameter from Johnson–Mehl–Avrami–Erofeev–Kolmogorov
(JMAEK) equation led us to the following kinetic triplet: activation energy, E=170.5±2.5 kJ mol–1
, pre-exponential factor, A=1.178±0.350·10
10 min–1 and JMAEK model (A
m) m=1.5. |
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Keywords: | non-isothermal kinetics silica-soda-lead glass |
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