Synthesis of Submicrometer Mullite Powder via High-Temperature Aerosol Decomposition |
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Authors: | Katherine A. Moore, ,Joseph CesaranoIII,&dagger Douglas M. Smith, &Dagger ,Toivo T. Kodas |
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Affiliation: | UNM/NSF Center for Micro-Engineered Ceramics, University of New Mexico, Albuquerque, New Mexico 87131;Division 1846, Sandia National Laboratories, Albuquerque, New Mexico 87185 |
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Abstract: | High-purity mullite powders (3Al2O3.2SiO2) have been prepared using a high-temperature aerosol decomposition technique yielding submicrometer (0.6 μm average) particles of spherical morphology with no hard agglomerates using aluminum nitrate and fumed silica as precursors. Depending upon the reaction conditions used, the powders range from amorphous to crystalline with no evidence of secondary-phase formation. This mullite synthesis approach has the advantages of not requiring postsynthesis milling, the ability to use a wide range of precursor systems, and enhanced control over chemical homogeneity and particle size/shape. |
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Keywords: | mullite powders synthesis aerosol high temperature |
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