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Ordered Structures in Ba(Cd1/3Ta2/3)O3 Microwave Ceramics: A Transmission Electron Microscopy Study

Published online by Cambridge University Press:  01 February 2011

J. Sun ,
S. J. Liu ,
N. Newman  and
David. J. Smith
J. Sun
Affiliation:
Center for Solid State Science School of Materials Science and Engineering, Shanghai Jiao-tong University, Shanghai 20003, P. R. China
S. J. Liu
Affiliation:
Department of Chemical and Materials Engineering, Materials and Engineering Program
N. Newman
Affiliation:
Department of Chemical and Materials Engineering, Materials and Engineering Program
David. J. Smith
Affiliation:
Center for Solid State Science Department of Physics and Astronomy, Arizona State University, Tempe AZ 85287, U.S.A.
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Abstract

Ordered structures of Ba(Cd1/3Ta2/3)O3 ceramics with and without boron additive were investigated systemically by electron diffraction and high resolution transmission electron microscopy. The results showed a well-ordered structure of 1:2 with hexagonal symmetry for Ba(Cd1/3Ta2/3)O3 with boron additive. No significant changes in ordered structures were observed after long-period annealing. The 1:2 ordered domain structures (average domain size ∼18 nm) and high-density domain boundaries induced by ordering were observed for Ba(Cd1/3Ta2/3)O3 without boron additive sintered at relatively high temperature. The sintering process has a profound influence on the microstructure of Ba(Cd1/3Ta2/3)O3 ceramics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 783: Symposium B – Materials, Intergration, and Packaging Issues for High-Frequency Devices , 2003 , B5.12
Copyright
Copyright © Materials Research Society 2004

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References

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