h-MoO.sub.3 phase transformation by four thermal analysis techniques

Molybdenum trioxide (MoO.sub.3) has been studied by four thermal analysis techniques. The as-synthesized material has hexagonal structure (h-MoO.sub.3). The phase change in the material studied using four thermal analysis techniques: thermogravimetric analysis, differential scanning calorimetry (DSC...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2020-04, Vol.140 (2), p.735
Main Authors: Paraguay-Delgado, Francisco, Mendoza Duarte, Monica E, Kalu, O, Estrada Moreno, Ivan A, Alonso-Lemus, Ivonne, Lardizábal-G, Daniel
Format: Article
Language:English
Subjects:
Calorimetry
Diffraction
Methods
Molybdenum
Molybdenum oxides
X-rays
Online Access:Get full text
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Summary:Molybdenum trioxide (MoO.sub.3) has been studied by four thermal analysis techniques. The as-synthesized material has hexagonal structure (h-MoO.sub.3). The phase change in the material studied using four thermal analysis techniques: thermogravimetric analysis, differential scanning calorimetry (DSC), thermomechanical analysis, and dynamic mechanical analysis. Crystallography phase transformation of h-MoO.sub.3 was found between 675 and 701 K by these techniques. DSC technique provided the highest detection sensitivity at about 690 K since the metastable monoclinic phase ([beta]-MoO.sub.3) transformation could be observed before reaching the stable orthorhombic ([alpha]-MoO.sub.3) phase. The crystallographic phases of particles and morphologies were confirmed by X-ray diffraction and scanning electron microscopy techniques. The h-MoO.sub.3 was proposed as a standard sample to validate the operations of the thermal analysis instruments.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-019-08842-0