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Study of the structure and dielectric relaxation behavior of Pb(Mg1/3Nb2/3)O3–PbTiO3 ferroelectric ceramics

Published online by Cambridge University Press:  31 January 2011

Xiaowen Zhang  and
Fei Fang
Xiaowen Zhang*
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic China
Fei Fang
Affiliation:
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People's Republic China
*
a)Address all correspondence to this author. e-mail: zhangxw@mail.tsinghua.edu.cn
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Abstract

(1–x)PMN–xPT[PMN, Pb(Mg1/3Nb2/3)O3; PT, PbTiO3] system ferroelectric ceramics with x = 0.30, 0.33, 0.35, and 0.38 were synthesized by the columbite precursor method. Their structure and dielectric behavior were investigated. X-ray diffraction results demonstrate that no two-phase region is presented, but a quasi-cubic to tetragonal phase boundary lies between x = 0.30 and 0.33. Examination of the dielectric behavior reveals that the transformation from relaxor to normal ferroelectric behavior across the morphotropic phase boundary (MPB) is successive and continuous. It is suggested that x 4 0.30 to 0.33 is the composition of MPB for the PMN–PT system. The MPB is also a boundary for the PMN–PT system to transform from relaxor to normal ferroelectrics.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 12 , December 1999 , pp. 4581 - 4586
Copyright
Copyright © Materials Research Society 1999

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References

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