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h-MoO3 phase transformation by four thermal analysis techniques

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Abstract

Molybdenum trioxide (MoO3) has been studied by four thermal analysis techniques. The as-synthesized material has hexagonal structure (h-MoO3). 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-MoO3 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 (β-MoO3) transformation could be observed before reaching the stable orthorhombic (α-MoO3) phase. The crystallographic phases of particles and morphologies were confirmed by X-ray diffraction and scanning electron microscopy techniques. The h-MoO3 was proposed as a standard sample to validate the operations of the thermal analysis instruments.

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Acknowledgements

The authors wish to thank and acknowledge L. de La Torre for his technical analysis. Thanks to W. Antunez, K. Campos, I. Estrada G. and E. Lestarjet for their help by SEM and XRD data acquisition, and Nanotech Lab, CIMAV, Chihuahua, Mexico.

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Authors and Affiliations

  1. Centro de Investigación en Materiales Avanzados SC (CIMAV), Av. Miguel de Cervantes 120, Complejo Industrial Chihuahua, C.P. 31136, Chihuahua, Chihuahua, Mexico

    Francisco Paraguay-Delgado, Monica E. Mendoza Duarte, O. Kalu, Ivan A. Estrada Moreno & Daniel Lardizábal-G

  2. Centro de Investigación y Estudios Avanzados del IPN (CINVESTAV-Saltillo), Departamento de Sustentabilidad de los Recursos Naturales y Energía, Cátedras CONACyT, Av. Industria Metalúrgica 1602, Parque Industrial Saltillo-Ramos Arizpe, C.P. 25900, Ramos Arizpe, Coahuila, Mexico

    Ivonne Alonso-Lemus

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  1. Francisco Paraguay-Delgado
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  2. Monica E. Mendoza Duarte
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  3. O. Kalu
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  4. Ivan A. Estrada Moreno
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  5. Ivonne Alonso-Lemus
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  6. Daniel Lardizábal-G
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Correspondence to Daniel Lardizábal-G.

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Paraguay-Delgado, F., Mendoza Duarte, M.E., Kalu, O. et al. h-MoO3 phase transformation by four thermal analysis techniques. J Therm Anal Calorim 140, 735–741 (2020). https://doi.org/10.1007/s10973-019-08842-0

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  • DOI: https://doi.org/10.1007/s10973-019-08842-0

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