Preparation of Barium Titanate Nanoparticles by Particle Growth Control

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Barium titanate (BaTiO3) nanoparticles were prepared by a two-step thermal decomposition method using barium titanyl oxalate nanoparticles of size 30 nm with and without dry-jet milling. Dry-jet milled barium titanyl oxalate nanoparticles (BTO-B) were well-dispersed whereas those without the dry-jet milling procedure (BTO-A) were partially aggregated. A heat annealing of obtained BaTiO3 nanoparticles at the same temperature resulted in crystallite sizes of the BTO-A derived BaTiO3 nanoparticles much smaller than those of the BTO-B derived. A mesoscopic particle structure analysis of revealed much thinner surface cubic layer thickness of the BTO-B derived BaTiO3 nanoparticles compared with the BTO-A derived BaTiO3 nanoparticles. This indicated the particle growth rate to be the most important parameter for the surface cubic layer thickness determination. A relationship between the surface cubic layer thickness and the particle growth rate was investigated precisely in this study.

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Periodical:

Edited by:

Shinobu Fujihara and Tadashi Takenaka

Pages:

171-174

DOI:

10.4028/www.scientific.net/KEM.445.171

Citation:

S. Kondo et al., "Preparation of Barium Titanate Nanoparticles by Particle Growth Control", Key Engineering Materials, Vol. 445, pp. 171-174, 2010

Online since:

July 2010

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$35.00

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