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The role of ordered A1-site vacancies in belt nano-domains of Pb1−xBaxNb2O6 (PBN) solid solution

Published online by Cambridge University Press:  31 January 2011

Xiaoyue Xiao ,
Yan Xu ,
Zhigang Zeng ,
Zhilun Gui ,
Longtu Li  and
Xiaowen Zhang
Xiaoyue Xiao*
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
Yan Xu
Affiliation:
Department of Chemistry, Tsinghua University, Beijing, 100084, China
Zhigang Zeng
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
Zhilun Gui
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
Longtu Li
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
Xiaowen Zhang
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
*
a) Author to whom all correspondence should be addressed.
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Abstract

The order-disorder states of the A-site vacancy of PBN solid solution affected by different thermal treatments were studied with the aid of High Resolution Electron Microscopy (HREM). PBN ceramics around the morphotropic phase boundary were prepared through two routes to control ordering degree of the A-site vacancy: (1) samples through quenching processes resulted in chaotic states of the A-site vacancies and misfit anti-phase boundary; (2) samples through slow cooling led to an ordered structure of the vacancies in the A1-site. The ordered A1-site vacancies were modulated by interchanges of the sublattices of the ordered vacancies and the Pb2+ cations in the A1-sites along both and orientations, forming a narrow discommensurate wall between two anti-phase domains. The anti-phase domains were observed as a regular belt structure with dimensions of about 45 nm × (≥120) nm. The belt nano-domain structures were a result of quasi-equilibrium thermodynamic processes.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 3 , March 1996 , pp. 650 - 656
Copyright
Copyright © Materials Research Society 1996

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References

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