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Sol-Gel Processing and Structure Development of Lead Titanate Particles

Published online by Cambridge University Press:  21 February 2011

John S. Wright  and
Lorraine Falter Francis
John S. Wright
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. S.E., Minneapolis, MN 55455.
Lorraine Falter Francis
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. S.E., Minneapolis, MN 55455.
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Abstract

Spherical particles of lead titanate, PbTiO3, (PT) were prepared from partially hydrolyzed alkoxide solutions modified with benzoic acid. Modified and aged alkoxide solutions were added dropwise to isopropyl alcohol, forming particles (0.2 to 1.0 μm in diameter). FTIR spectroscopy results demonstrate chelation of the PT alkoxide which prevented the formation of an extended gel network. Diffuse reflectance FTIR (DRIFT) spectra indicate the benzoate ligands are present until 450°C; TGA results show significant weight loss at 450°C. PT particles crystallize into the perovskite phase at =450°C, as determined by DTA and XRD. The relatively low crystallization temperature may be due to the effect of benzoate ligands on amorphous structure and presence of internal surfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 797
Copyright
Copyright © Materials Research Society 1998

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References

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