Non-isothermal decomposition kinetics of synthetic serrabrancaite precursor in [N.sub.2] atmosphere

The thermal decomposition of synthetic serrabrancaite (MnP[O.sub.4] x [H.sub.2]O) was studied in [N.sub.2] atmosphere using TG-DTG-DTA. Thermal analysis results indicate that the decomposition occurs in two stages, which are assigned to the dehydration and the reduction processes and the final produ...

Full description

Saved in:
Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2010-01, Vol.99 (1), p.357
Main Authors: Boonchom, Banjong, Danvirutai, Chanaiporn, Thongkam, Montree
Format: Article
Language:English
Subjects:
Diffraction
X-rays
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The thermal decomposition of synthetic serrabrancaite (MnP[O.sub.4] x [H.sub.2]O) was studied in [N.sub.2] atmosphere using TG-DTG-DTA. Thermal analysis results indicate that the decomposition occurs in two stages, which are assigned to the dehydration and the reduction processes and the final product is [Mn.sub.2][P.sub.2][O.sub.7]. X-ray powder diffraction, FT-IR and FT-Raman techniques were used for identification of the solid decomposition product. The decomposition kinetics analysis of MnP[O.sub.4] x [H.sub.2]O was performed under non-isothermal condition through isoconversional methods of Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS). The dependences of activation energies on the extent of conversions are observed in the dehydration and the reduction reactions, which could be concluded the "multi-step" processes.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-009-0096-2