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Study of the Electrical Properties of Pb(Mg,Ni)1/3Nb2/3O3-PbTiO3 System Across the Morphotropic Phase Boundary

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Abstract

Phase transitional behavior and electrical properties of (1 − x)Pb(Mg,Ni)1/3Nb2/3O3-xPbTiO3 ceramics (PMNN-PT with Mg/Ni = 1:1, x = 0.20–0.40) across the morphotropic phase boundary (MPB) were examined. X-ray diffraction and dielectric measurement reveal that two phases, pseudocubic and tetragonal phases, coexist in the composition range x = 0.30–0.36. The maximum d 33 (about 570 pC/N) was observed at the composition x = 0.32–0.34. Dielectric and ferroelectric properties exhibit abnormal high near the MPB. An unusual peak shoulder occurred in the dielectric measurement upon thermal cycling for poled samples. This phenomenon was considered to be associated with the “macro to micro domain” transition and depolarization.

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Authors and Affiliations

  1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science, Tsinghua University, Beijing, 100084, People's Republic of China

    Chao Lei & Xiaowen Zhang

  2. Department of Physics, Tsinghua University, Beijing, 100084, People's Republic of China

    Kepi Chen

Authors
  1. Chao Lei
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  2. Kepi Chen
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  3. Xiaowen Zhang
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Lei, C., Chen, K. & Zhang, X. Study of the Electrical Properties of Pb(Mg,Ni)1/3Nb2/3O3-PbTiO3 System Across the Morphotropic Phase Boundary. Journal of Electroceramics 10, 233–239 (2003). https://doi.org/10.1023/B:JECR.0000011222.65659.6e

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  • DOI: https://doi.org/10.1023/B:JECR.0000011222.65659.6e

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