Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 88: Issue 3
Non-isothermal kinetic study on the decomposition of Zn acetate-based sol-gel precursor
Part II. The application of the IKP method
Authors:
P. Budrugeac INCDIE-ICPE-CA -National Institute for Research and Development in Electrical Engineering 313 Splaiul Unirii 030138 Bucharest Romania

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V. Muşat Dunărea de Jos’ University of Galati Department of Metals and Materials Science 111 Domneasca 6200 Galati Romania

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E. Segal University of Bucharest Department of Physical Chemistry 4-12 Bd. Elisabeta 7034 Bucharest Romania

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Pages:
699–702
Online Publication Date:
27 Jul 2007
Publication Date:
01 Jun 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-006-8086-0
Keywords:
invariant kinetic parameter method; sol-gel; Zn acetate-based precursor
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Abstract  

The paper presents a non-isothermal kinetic study of the decomposition of Zn acetate-based gel precursors for ZnO thin films, based on the thermogravimetric (TG) data. The evaluation of the dependence of the activation energy (E) on the mass loss (Δm) using the isoconversional methods (Friedman (FR), Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS)) has been presented in a previous paper. It was obtained that the sample dried at 125°C for 8 h exhibits the activation energy independent on the heating rate for the second decomposition step. In this paper the invariant kinetic parameter (IKP) method is used for evaluating the invariant activation parameters, which were used for numerically evaluation of the function of conversion. The value of the invariant activation energy is in a good agreement with those determined by isoconversional methods. In order to determine the kinetic model, IKP method was associated with the criterion of coincidence of the kinetic parameters for all heating rates. Finally, the following kinetic triplet was obtained: E=91.7 (±0.1) kJ mol−1, lnA(s−1)=16.174 (±0.020) and F1 kinetic model.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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