Nanostructured Alumina Particles Synthesized by the Spray Pyrolysis Method: Microstructural and Morphological Analyses Articles uri icon

publication date

  • March 2010

start page

  • 767

end page

  • 772

issue

  • 2

volume

  • 36

international standard serial number (ISSN)

  • 0272-8842

electronic international standard serial number (EISSN)

  • 1873-3956

abstract

  • Ultrafine particles or nanoparticles (ranging from a few nanometers to 100 nm) are of considerable interest for a wide variety of applications, ranking from catalyst to luminescence ceramics, due to their unique and
    improved properties primarily determined by size, composition and
    structure. This study presents the preparation and characterization of
    nanostructured spherical alumina particles by the Spray Pyrolysis method
    for the application in reinforcements of metal-matrix composites
    (MMCs). Synthesis procedure includes aerosol formation ultrasonically
    from alumina nitrate water solution and its decomposition into a tubular
    flow reactor at 700 °C. The obtained particles are spherical, smooth,
    amorphous and in non-agglomerated state. Microstructural and
    morphological analyses were carried out using X-ray diffraction (XRD),
    scanning electron microscopy (SEM/EDS) and analytical and high
    resolution transmission electron microscopy (TEM/HRTEM).