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Chemically Prepared Lead Magnesium Niobate Dielectrics

Published online by Cambridge University Press:  10 February 2011

B. A. Tuttle ,
J. A. Voigt ,
D. L. Sipola ,
W. R. Olson  and
D. M. Goy
B. A. Tuttle
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
J. A. Voigt
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
D. L. Sipola
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
W. R. Olson
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
D. M. Goy
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
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Abstract

A chemical solution powder synthesis technique has been developed that produces fine, uniform powders of lead magnesium niobate (PMN) with 60 to 80 nm crystallite size. The synthesis technique was based on the dissolution of lead acetate and alkoxide precursors in acetic acid followed by precipitation with oxalic acid/propanol solutions. Lead magnesium niobate ceramics fabricated from these chemically derived powders had smaller, more uniform grain size and higher dielectric constants than ceramics fabricated from mixed oxide powders that were processed under similar thermal conditions. Chem-prep PMN dielectrics with peak dielectric constants greater than 22,000 and polarizations in excess of 29 μC/cm2 were obtained for 1100°C firing treatments. Substantial decreases in dielectric constant and polarization were measured for chemically prepared PMN ceramics fired at lower temperatures, consistent with previous work on mixed oxide materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 495: Symposium W – Chemical Aspects of Electronic Ceramics Processing , 1997 , 185
Copyright
Copyright © Materials Research Society 1998

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References

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