Acta Physica Sinica, Volume. 69, Issue 12, 127705-1(2020)

Effect of manganese doping on ferroelectric and piezoelectric properties of KNbO3 and (K0.5Na0.5)NbO3 lead-free ceramics

Ze Xu1, Lu-Yao Lou1, Chun-Lin Zhao1, Hao-Cheng Tang1, Yi-Xuan Liu1, Zhao Li1, Xiao-Mei Qi2, Bo-Ping Zhang2、*, Jing-Feng Li1, Wen Gong3、*, and Ke Wang1、*
Author Affiliations
  • 1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • 2School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 3Advanced Ceramic Materials & Devices Research Center, Yangtze Delta Region Institute of Tsinghua University, Zhejiang, Jiaxing 314006, China
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    Figures & Tables(8)
    XRD patterns of KN, KN-Mn, KNN, and KNN-Mn ceramics.
    SEM images of the thermally etched surface: (a) KN, (b) KN-Mn, (c) KNN, (d) KNN-Mn ceramics.
    Domain images of unpoled KN, KN-Mn, KNN, KNN-Mn ceramics tested in (a)−(d) vertical piezoresponse force microscopy (VPFM) and (e)−(h) lateral piezoresponse force microscopy (LPFM).
    X-band ESR spectra: (a) KN-Mn ceramics; (b) KNN-Mn ceramics.
    (a) Raman spectra of KN, KN-Mn, KNN, KNN-Mn ceramics; (b) schematic illustration of three internal vibrational modes of NbO6 octahedra. V1 and V2 are stretching modes, and V5 is bending mode.
    Temperature dependence of dielectric permittivity and dielectric loss of unpoled for ceramics: (a) KN, KN-Mn ceramics; (b) KNN, KNN-Mn ceramics.
    Polarization hysteresis loops of (a) KN, (b) KN-Mn, (e) KNN, (f) KNN-Mn ceramics; bipolar piezoelectric strain curves of (c) KN, (d) KN-Mn, (g) KNN, (h) KNN-Mn ceramics.
    • Table 1.

      Relative density, piezoelectric and dielectric properties of KN, KN-Mn, KNN, and KNN-Mn ceramics.

      KN, KN-Mn, KNN和KNN-Mn陶瓷的相对密度、压电性能和介电性能

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      Table 1.

      Relative density, piezoelectric and dielectric properties of KN, KN-Mn, KNN, and KNN-Mn ceramics.

      KN, KN-Mn, KNN和KNN-Mn陶瓷的相对密度、压电性能和介电性能

      d33/pC·N–1Relative density/%kpQmθmax/(°) tanδεr (1 kHz)
      KN9092.00.26177660.042576
      KN-Mn8395.10.27185770.015526
      KNN11594.90.2985640.060393
      KNN-Mn10994.30.32330830.024355
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    Ze Xu, Lu-Yao Lou, Chun-Lin Zhao, Hao-Cheng Tang, Yi-Xuan Liu, Zhao Li, Xiao-Mei Qi, Bo-Ping Zhang, Jing-Feng Li, Wen Gong, Ke Wang. Effect of manganese doping on ferroelectric and piezoelectric properties of KNbO3 and (K0.5Na0.5)NbO3 lead-free ceramics [J]. Acta Physica Sinica, 2020, 69(12): 127705-1

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    Paper Information

    Received: Feb. 24, 2020

    Accepted: --

    Published Online: Dec. 8, 2020

    The Author Email: Wen Gong (gongwen@tsinghua-zj.edu.cn), Ke Wang (wang-ke@tsinghua.edu.cn)

    DOI:10.7498/aps.69.20200277

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