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Crystallization Behavior in Precursor-Modified Sol-Gel Lead

Published online by Cambridge University Press:  22 February 2011

Titanate Powders ,
Wei-Heng Shie ,
Qing Lu  and
Wan Y. Shih
Titanate Powders
Affiliation:
Department of Materials Engineering, Drexel University, Philadelphia, PA 19104
Wei-Heng Shie
Affiliation:
Department of Materials Engineering, Drexel University, Philadelphia, PA 19104
Qing Lu
Affiliation:
Department of Materials Engineering, Drexel University, Philadelphia, PA 19104
Wan Y. Shih
Affiliation:
Department of Materials Engineering, Drexel University, Philadelphia, PA 19104, and Department of Chemical Engineering, Princeton University, Princeton, NJ 08544.
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Abstract

The molecular structure of precursors in sol-gel processing of PbTiO3 is modified via β-diketone substitution for the isopropyl groups of titanium isopropoxide. Crystallite size and crystallization behavior are studied using x-ray diffractometry and differential thermal analysis. The crystallite size decreases with increasing amount of β-diketone substitution. Whereas the weight percent of crystalline phase first decreases and then increases with increasing β-diketone substitution. Our results indicate that the β-diketone substitution reduces the size of the structural units in the gel network resulting in smaller crystallite size and more nucleation sites in the powders produced.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 284: Symposium G – Amorphous Insulating Thin Films , 1992 , 481
Copyright
Copyright © Materials Research Society 1993

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References

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