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Synthesis of nanotabular barium titanate via a hydrothermal route

Published online by Cambridge University Press:  01 April 2005

Timothy J. Yosenick ,
David V. Miller ,
Rajneesh Kumar ,
Jennifer A. Nelson ,
Clive A. Randall  and
James H. Adair
Timothy J. Yosenick
Affiliation:
NSF Particulate Materials Center, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
David V. Miller
Affiliation:
Bectel-Bettis, West Mifflin, Pennsylvania 15122
Rajneesh Kumar
Affiliation:
NSF Particulate Materials Center, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
Jennifer A. Nelson
Affiliation:
NSF Particulate Materials Center, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
Clive A. Randall
Affiliation:
NSF Particulate Materials Center, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
James H. Adair
Affiliation:
NSF Particulate Materials Center, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
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Abstract

As layer thickness of multilayer ceramic capacitors decreases, nanoparticles of high dielectric materials, especially BaTiO3, are needed. Tabular metal nanoparticles produce thin metal layers with low surface roughness via electrophoretic deposition. To achieve similar results in dielectric layers requires the synthesis and dispersion of tabular BaTiO3 nanoparticles. In the current study, the synthesis of BaTiO3 was investigated using a hydrothermal route. Transmission electron microscopy and atomic force microscpy analyses show that the synthesized particles are single crystal with a 〈111〉 zone axis and a median thickness of 5.8 nm and face diameter of 27.1 nm. Particle growth is likely controlled by the formation of {111} twins and the synthesis pH, which stabilizes the {111} face during growth. With limited growth in the 〈111〉 direction, the particles develop a platelike morphology. Physical property characterization shows the powder is of high purity with low hydrothermal defect concentrations and controlled stoichiometry.

Keywords

FerroelectricHydrothermalNanoparticle
Type
Research Article
Information
Journal of Materials Research , Volume 20 , Issue 4 , April 2005 , pp. 837 - 843
Copyright
Copyright © Materials Research Society 2005

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References

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