Study of surfaces and morphologies of proteic sol–gel derived barium aluminate nanopowders: An experimental and computational study
Rezende, M.V. D. S., Arrouvel, C., Parker, S. C., Rey, J.F.Q. and Valerio, M.E.G., 2012. Study of surfaces and morphologies of proteic sol–gel derived barium aluminate nanopowders: An experimental and computational study. Materials Chemistry and Physics, 136 (2-3), pp. 1052-1059.
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BaAl 2O 4 nanoparticles samples were prepared by sol-gel proteic route. The preparation of the precursor mixture and the formation of the ceramic product were monitored using TG/DTA, X-ray diffraction (XRD), electron microscopy (SEM, TEM). The results show that sol-gel proteic route is a reliable method for the synthesis of pure BaAl 2O 4 powders and that irregular hexagonal facetted nanoparticles are observed. Atomistic modeling was used to calculate the structures and energies of 24 (hkl) surfaces and to evaluate morphologies of BaAl 2O 4 at the thermodynamic and pseudo-kinetic equilibrium. The calculations show that the two most stable surfaces are the (001) and (011) with a surface energy of 1.33 J m -2 and 1.36 J m -2 respectively and that the predicted morphologies are in accord with experiment.
|Creators||Rezende, M.V. D. S., Arrouvel, C., Parker, S. C., Rey, J.F.Q. and Valerio, M.E.G.|
|Departments||Faculty of Science > Chemistry|
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