Author： Chandradass J. Kim Ki Hyeon
Publisher： Taylor & Francis Ltd
ISSN： 1042-6914
Source： Materials and Manufacturing Processes, Vol.24, Iss.5, 2009-05, pp. : 541-545
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Abstract
Nanocrystalline α-Al2O3 powders have been prepared by pyrolysis of a complex compound of aluminum with acetylacetone. The volumetric ratio (alumina to acetylacetone) of the starting feedstock has been shown to be a critical factor for the formation of nano α-Al2O3 powders. The optimum calcinations temperature of the precursor powder for crystallization of nano α-Al2O3 was found to be 1000°C for 2 h. Transmission electron microscopy (TEM) micrographs showed, the obtained materials could be modified from segregated nanoparticle to aggregates of nanoparticle with decrease in the volume ratio of alumina to acetylacetone from 8:2 to 5:5 in the precursor solutions. Fourier transform infrared spectra (FTIR) analysis show peak at 450 cm-1 corresponds to α-Al2O3 at 1000°C.
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