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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.

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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