Open AccessThermal decomposition of a molecular material {N(n-C4H9)4[FeIIFeIII(C2O4)3]}∞ leading to ferrite: A reaction kinetics study
Author(s) -
Ashis Bhattacharjee,
Debasis Roy,
Madhusudan Roy,
Arunabha Adhikari
Publication year - 2012
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc120519145b
Subject(s) - thermogravimetry , thermal decomposition , activation energy , oxalate , isothermal process , decomposition , kinetics , atmospheric temperature range , reaction mechanism , chemistry , chemical decomposition , chemical kinetics , ferrite (magnet) , reaction rate , thermal analysis , order of reaction , materials science , thermodynamics , thermal , reaction rate constant , inorganic chemistry , organic chemistry , catalysis , physics , quantum mechanics , composite material
A multi-step thermal decomposition of a molecular precursor, {N(n-C4H9)4[FeIIFeIII(C2O4)3}∞ has been studied using non-isothermal thermogravimetry (TG) measurements in the temperature range 300 to ~800 K at multiple heating rates (5, 10 and 20 K min-1). The thermal decomposition of the oxalate-based complex proceeds stepwise through a series of intermediate reactions. Two different isoconversional methods, namely, improved iterative method and model-free method are employed to evaluate the kinetic parameters: activation energy and rate of reaction, and the most probable reaction mechanism of thermal decomposition is also determined. The different reaction pathways leading to different steps in the TG profile have also been explored which are supplemented by earlier experimental observations of the present authors
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