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  • Mechanism of nanoparticle agglomeration during the combustion synthesis

    Author(s)
    Altman, IS
    Agranovski, IE
    Choi, M
    Griffith University Author(s)
    Agranovski, Igor E.
    Altman, Igor
    Year published
    2005
    Metadata
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    Abstract
    The mechanism of agglomeration of nanoparticles generated during combustion synthesis is discussed. This is based on the analysis of the transmission electron microscope images of probes collected at different heights. Although direct temperature measurements were not available, the qualitative temperature dependence of the particle formation streamlines is taken into account. It is demonstrated that agglomeration of the MgO nanoparticles, which are formed during a Mg particle combustion, occurs as the result of bonding the mature nanoparticles by the supercritical clusters existing in the system. Accumulation of these ...
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    The mechanism of agglomeration of nanoparticles generated during combustion synthesis is discussed. This is based on the analysis of the transmission electron microscope images of probes collected at different heights. Although direct temperature measurements were not available, the qualitative temperature dependence of the particle formation streamlines is taken into account. It is demonstrated that agglomeration of the MgO nanoparticles, which are formed during a Mg particle combustion, occurs as the result of bonding the mature nanoparticles by the supercritical clusters existing in the system. Accumulation of these supercritical clusters in the flame has been revealed and their nature has been explained in our recent paper [I.S. Altman, I.E. Agranovski, and M. Choi, Phys. Rev E70, 062603 (2004)]. Also, some inspection of the previously published experimental data on the nanoparticle generation shows that the similar supercritical clusters may exist in another flame reactor generating titania nanopaprticles. If this is the case, the cluster-based process of nanoparticle bonding we suggest can be considered to be general.
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    Journal Title
    Applied Physics Letters
    Volume
    87
    DOI
    https://doi.org/10.1063/1.2005387
    Subject
    Physical sciences
    Engineering
    Publication URI
    http://hdl.handle.net/10072/4290
    Collection
    • Journal articles

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