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Thermal decomposition kinetics and lifetime of the complex of Tb2（BA）6（PHEN）2

ZHANGJianjun、WANGRuifen、WANGShuping、LIUHongmei、LIJibiao、BAIJihai

2004稀有金属：英文版Materials Science被引 1

摘要

The thermal behavior of Tb2(BA)6(PHEN)2 (BA: benzoate, and PHEN: 1,10-phenanthroline) in a static air atmosphere was investigated by TG-DTG, SEM and IR techniques. By the kinetic method of processing thermal analysis data put forward by Malek et al., it is defined that the kinetic modelfor the first-step thermal decomposition is SB(m, n). The activation energy E for this step reaction is 99.07 kJ/mol, the entropy of activation △S' is -84.72 J/mol, the enthalpy of activation △H' is 94.26 kJ/mol, the free energy of activation △G' is 144.77 kJ/mol and the pre-exponential factor lnA is 20.93.The lifetime equation at mass-loss of 10% was deduced as lnτ = -29.0312 + 19760.83/T by isothermal thermogravimetric analysis.

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