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Suppression of Exaggerated Grain Growth During Sintering of Nano-Sized Barium Titanate Powders

Published online by Cambridge University Press:  16 February 2011

K.S. Meyers  and
R.F. Speyer
K.S. Meyers
Affiliation:
Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
R.F. Speyer
Affiliation:
Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
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Abstract

Rate controlled sintering (RCS) was used to sinter nano-sized BaTiO3 particles. A distinct shift in temperature slope above 1150-1200°C during RCS implied a change in sintering mechanism, and a corresponding exaggerated grain growth (grain size ~40-50 μm). By suppression of the exaggerated grain growth by firing a specimen packed in BaCO3, these phenomena were shown to be the result of a shift in phase equilibria from the volatilization of BaO from BaTiO3; the eutectic liquid which formed permitted rapid grain growth by a dissolution and precipitation process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 547: Symposium DD – Solid-State Chemistry of Inorganic Materials II , 1998 , 115
Copyright
Copyright © Materials Research Society 1999

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