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Morphological evolution of barium titanate synthesized in water in the presence of polymeric species

Published online by Cambridge University Press:  31 January 2011

Roger B. Bagwell
Affiliation:
Max-Planck-Institut für Metallforschung and Institut für Nichtmetallische Anorganische Materialien, Universität Stuttgart, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 70569 Stuttgart, Germany
Jürgen Sindel
Affiliation:
Max-Planck-Institut für Metallforschung and Institut für Nichtmetallische Anorganische Materialien, Universität Stuttgart, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 70569 Stuttgart, Germany
Wolfgang Sigmund
Affiliation:
Max-Planck-Institut für Metallforschung and Institut für Nichtmetallische Anorganische Materialien, Universität Stuttgart, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, 70569 Stuttgart, Germany
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Abstract

The synthesis of barium titanate (BaTiO3) was investigated in water at 90 °C in the presence of polymeric additives. Homopolymers (polyacrylic acid) and block copolymers (polyethylene oxide-block-polymethacrylic acid) were added during synthesis to influence particle morphology and size distribution. The polymers affected the morphological evolution of the forming powder by adsorbing preferentially on specific planes. The polymeric species additionally slowed the formation of barium titanate. The barium concentration also changed the morphology, particle size, and other powder characteristics.

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Articles
Copyright
Copyright © Materials Research Society 1999

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