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Direct Synthesis of Barium Titanate Nanoparticles Via a Low Pressure Spray Pyrolysis Method

Published online by Cambridge University Press:  03 March 2011

Wei-Ning Wang ,
I. Wuled Lenggoro ,
Yoshitake Terashi ,
Yu-Cong Wang  and
Kikuo Okuyama
Wei-Ning Wang
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi, Hiroshima 739-8527, Japan
I. Wuled Lenggoro
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi, Hiroshima 739-8527, Japan
Yoshitake Terashi
Affiliation:
Kyocera Corporation R&D Center, Kokubu, Kagoshima 899-4312, Japan
Yu-Cong Wang
Affiliation:
Kyocera Corporation R&D Center, Kokubu, Kagoshima 899-4312, Japan
Kikuo Okuyama*
Affiliation:
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi, Hiroshima 739-8527, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The one-step synthesis of barium titanate (BaTiO3) nanoparticles was studied by employing a low-pressure spray pyrolysis (LPSP) method. The effects of temperature, pressure, and the addition of urea to the precursor were investigated experimentally. The results were compared with the experimental data of the conventional (atmospheric) spray pyrolysis method. It was shown that the BaTiO3 nanoparticles could be synthesized by the low-pressure method, while only spherical hollow particles with smooth surfaces could be produced by the conventional spray method. The addition of urea greatly improved the crystal growth and particle breakup due to extra heat supplied during the combustion reaction coupled with the evolution of gases. The dispersity of nanoparticles increased with the quantity of urea and with a decrease in pressure. The possible mechanism of the formation of BaTiO3 nanoparticles in the LPSP process was also proposed.

Keywords

CeramicNanoparticleSpray pyrolysis
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 10 , October 2005 , pp. 2873 - 2882
Copyright
Copyright © Materials Research Society 2005

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