Synthesis of α-alumina platelets from γ-alumina with and without microwaves

α-Al 2O 3 platelets of various sizes and size distributions were synthesized from powder mixture of γ-Al 2O 3 and Na 2SO 4 flux by heating with and without microwaves under the same heating schedule. The average particle size of the sample obtained by heating the powder mixture without the use of mi...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2007-09, Vol.466 (1), p.79-83
Main Authors: Lee, S.G., Park, H.C., Kang, B.S., Seo, G.S., Hong, S.S., Park, S.S.
Format: Article
Language:English
Subjects:
Al 2O 3
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Materials synthesis
materials processing
Microwave processing
Particle size
Physics
Platelets
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Summary:α-Al 2O 3 platelets of various sizes and size distributions were synthesized from powder mixture of γ-Al 2O 3 and Na 2SO 4 flux by heating with and without microwaves under the same heating schedule. The average particle size of the sample obtained by heating the powder mixture without the use of microwaves was larger than that by heating the same powder mixture with the use of microwaves. In addition, the particle size distribution of the sample obtained with the use of microwaves was narrow compared to that obtained without the use of microwaves. It was indicated that microwave processing facilitates formation of smaller size of α-alumina platelets with narrower size distribution, due to the non-thermal effect in nucleation and growth of α-alumina.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2007.02.041