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Dielectric, piezoelectric, and ferroelectric properties of Al2O3 and MnO2 modified PbSnO3–PbTiO3–Pb(Mg1/3Nb2/3)O3 ternary ceramics

Authors

  • Dawei Wang,

    Corresponding author
    1. Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA
    2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
    • College of Mechanical and Electrical Engineering, North China University of Technology, Beijing 100144, P.R. China
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  • Quanliang Zhao,

    1. College of Mechanical and Electrical Engineering, North China University of Technology, Beijing 100144, P.R. China
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  • Maosheng Cao,

    1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
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  • Yan Cui,

    1. College of Mechanical and Electrical Engineering, North China University of Technology, Beijing 100144, P.R. China
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  • Shujun Zhang

    1. Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA
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Corresponding author: e-mail wangdawei@ncut.edu.cn, Phone: +86 010 88802632, Fax: +86 010 88802632

e-mail soz1@psu.edu, Phone: 814 863-2639, Fax: 814 865-2326

Abstract

The PbSnO3–PbTiO3–Pb(Mg1/3Nb2/3)O3 (PST–PMN) ternary system with morphotropic phase-boundary (MPB) compositions were fabricated using a two-step columbite precursor method. The effects of Al2O3 and MnO2 addition on the dielectric, piezoelectric, and ferroelectric properties of PST–PMN were investigated. MnO2 acted as an acceptor dopant and induced a “hardening” effect in PST–PMN, with decreased piezoelectric coefficients d33 and increased mechanical quality factors Qm, while the addition of Al2O3 led to the significant decrease of piezoelectric properties, attributed to the second phase. Of particular interest is the fact that the Mn-doped PST–PMN exhibited excellent properties when the doping level was in the range of 0.2–0.5 wt%, with piezoelectric d33, planar electromechanical coupling kp, dielectric permittivity ϵr, Qm, remnant polarization Pr and coercive field EC being on the order of ∼510 pC N−1, ∼57%, 3120–3500, 530–600, 27–30 µC cm−2, and ∼8 kV cm−1, respectively, showing advantages over commercial PZT4-type ceramics, which are promising for high-power electromechanical applications.

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