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Dielectric properties and morphotropic phase boundaries in the xPb(Zn1/3Nb2/3)O3−(1−x)Pb(Zr0.5Ti0.5O3 pseudo-binary system

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Abstract

Ceramics in the xPb(Zn1/3Nb2/3)O3−(1−x)Pb(Zr0.5Ti0.5)O3 [xPZN–(1−x)PZT] solid solution system are expected to display excellent dielectric, piezoelectric, and ferroelectric properties in compositions close to the morphotropic phase boundary (MPB). The dielectric behavior of ceramics with x = 0.1−0.6 has been characterized in order to identify the MPB compositions in this system. Combined with X-ray diffraction results, ferroelectric hysteresis measurements, and Raman reflectivity analysis, it was consistently shown that an MPB exists between x = 0.2 and x = 0.3 in this binary system. When x ≤ 0.2, the tetragonal phase dominates at ambient temperatures. In the range of x ≥ 0.3, the rhombohedral phase dominates. For this rhombohedral phase, electrical measurements reveal a profound frequency dispersion in the dielectric response when x ≥ 0.6, suggesting a transition from normal ferroelectric to relaxor ferroelectric between 0.5 ≤ x ≤ 0.6. Excellent piezoelectric properties were found in 0.3PZN–0.7PZT, the composition closest to the MPB with a rhombohedral structure. The results are summarized in a PZN–PZT binary phase diagram.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, King Mongkut’s Institute of Technology, Ladkabang, Bangkok, 10520, Thailand

    N. Vittayakorn

  2. Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand

    G. Rujijanagul

  3. Materials Science and Engineering Department, Iowa State University, Ames, IA, 50011, USA

    X. Tan, H. He & M. A. Marquardt

  4. Department of Mechanical Engineering, Oregon State University, Corvallis, OR, 97331, USA

    D. P. Cann

Authors
  1. N. Vittayakorn
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  2. G. Rujijanagul
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  3. X. Tan
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  4. H. He
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  5. M. A. Marquardt
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  6. D. P. Cann
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Vittayakorn, N., Rujijanagul, G., Tan, X. et al. Dielectric properties and morphotropic phase boundaries in the xPb(Zn1/3Nb2/3)O3−(1−x)Pb(Zr0.5Ti0.5O3 pseudo-binary system. J Electroceram 16, 141–149 (2006). https://doi.org/10.1007/s10832-006-4927-2

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  • DOI: https://doi.org/10.1007/s10832-006-4927-2

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