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High Curie temperature perovskite BiInO3–PbTiO3 ceramics

Published online by Cambridge University Press:  03 March 2011

Runrun Duan ,
Robert F. Speyer ,
Edward Alberta  and
Thomas R. Shrout
Runrun Duan
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245
Robert F. Speyer
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245
Edward Alberta
Affiliation:
TRS Technologies, State College, Pennsylvania 16801
Thomas R. Shrout
Affiliation:
Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802-4800
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Abstract

The extent of BiInO3 substitution in the perovskite system xBiInO3–(1 - x)PbTiO3 and the corresponding raise in the Curie temperature were investigated using thermal analysis, dielectric measurements, x-ray diffraction, and electron microscopy. Maximum tetragonal perovskite distortion (c/a = 1.082) was obtained for x = 0.20, with a corresponding Curie temperature of 582 °C. Phase-pure tetragonal perovskite was obtained for x ⩽ 0.25. Compound formation after calcining mixed oxide powders resulted in agglomerated cube-shaped tetragonal perovskite particles, which could be fired to 94.7% of theoretical density (TD). Sol-gel fabrication resulted in nano-sized tetragonal or pseudo-cubic perovskite particles, which after two-step firing, resulted in a tetragonal perovskite microstructure at as high as (x = 0.20) 98.1% of TD.

Keywords

PiezoelectricSinteringPhase transformation
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 7 , July 2004 , pp. 2185 - 2193
Copyright
Copyright © Materials Research Society 2004

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