Microwave-Assisted Combustion Synthesis of α-Alumina and Magnesium Aluminate Spinel Nanocomposite Powders

Young Mi Jung; Sang Woo Kim

doi:10.4028/www.scientific.net/SSP.119.191

Paper Titles

Fabrication of High Density Y₂O₃ Ceramics by Magnetic Pulsed Compaction
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The Mechanical Milling Behavior of Ductile Cu Flakes when Using Ultrafine Al₂O₃ Reinforcements
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Consolidation and Mechanical Properties of Near-Net-Shape Al-21 wt.% Si Component Fabricated by Plasma Spray Forming
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Preparation of Impurity-Doped TiO₂ Nanoparticles and Their Applications for Photocatalysis and Biopanning
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Microwave-Assisted Combustion Synthesis of α-Alumina and Magnesium Aluminate Spinel Nanocomposite Powders
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Characterization and Photocatalytic Properties of Transition Metal Doped TiO₂ and Nanocomposite TiO₂ Powders Synthesized by Mechanical Alloying
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Photodefined Metal Pattern Formation and Its Electromagnetic Interference Shielding Effect
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Preparation and Characterization of PP/Organoclay Nanocomposites with Maleic-Anhydride
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Developing Carbon Nanocomposite Smart Materials
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Microwave-Assisted Combustion Synthesis of α-Alumina and Magnesium Aluminate Spinel Nanocomposite Powders

Abstract:

Microwave-assisted combustion synthesis of α-alumina-magnesium spinel nanocomposite powders from a route using ammonium aluminum carbonate hydroxide (AACH) as a precursor was studied. γ- to α-phase transformation temperature of microwave-assisted alumina composite powders is lowered by 100°C compared to that of normal heat-treated alumina composite powders. The crystallite size of the microwave-assisted composite powders was considerably decreased from 42 nm to 29 nm compared to that of the normal heat treated composite powders. Nanosized α- alumina-magnesium aluminate composite powders were successfully synthesized by microwave-assisted combustion under nitrogen atmosphere at 1050°C.