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Ferroelectric Thin Films Via Sol-Gel Processing of Singlesource Precursors

Published online by Cambridge University Press:  21 February 2011

C.D. Chandler ,
M.J. Hampden-Smith  and
R.W. Schwartz
C.D. Chandler
Affiliation:
Dept. of Chemistry and Center for Micro Engineered Ceramics, U.N.M., Albuquerque, NM 87131
M.J. Hampden-Smith
Affiliation:
Dept. of Chemistry and Center for Micro Engineered Ceramics, U.N.M., Albuquerque, NM 87131
R.W. Schwartz
Affiliation:
Sandia National Laboratory, Albuquerque, NM, 87185
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Abstract

The use of single-source mixed metal-organic precursors specifically designed for the formation of crystalline perovskite phase mixed metal oxide powders has been investigated. Pyridine solutions of divalent metal α-hydroxycarboxylates of general empirical formula A(O2CCMe2OH)2 where A = Pb, Ca, Sr, Ba; Me = methyl, were designed to react with metal alkoxides, for example, Ti(O-i-Pr)4, with the elimination of two equivalents of alcohol to form species with fixed A:B stoichiometry of 1:1 according to the equation: A(O2CCMe2OH)2 + B(OR)4 → A(O2CCMe2O)2B(OR)2 + 2HOR. Hydrolysis of these compounds in pyridine produces clear solutions which on removal of the solvent in vacuo, yield yellow powders. These powders readily dissolve in ethanol to give solutions from which thin films can be formed either by dip-coating or spin coating. The crystallization behavior, composition and ferroelectric properties of these films is discussed. The crystallization of the films generally required substantially higher temperatures compared to powders obtained from the same precursor solutions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 310: Symposium N – Ferroelectric Thin Films III , 1993 , 357
Copyright
Copyright © Materials Research Society 1993

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References

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