Journal of Materials Science

, Volume 47, Issue 6, pp 2687–2694 | Cite as

Effects of Nb2O5 addition on the microstructure, electrical, and mechanical properties of PZT/ZnO nanowhisker piezoelectric composites

  • Da-Wei Wang
  • Jie Yuan
  • Hong-Bo Li
  • Ran Lu
  • Quan-Liang Zhao
  • De-Qing Zhang
  • Mao-Sheng Cao


Nb2O5-modified PZT/ZnO nanowhisker (denoted as PZT/ZnOw–Nb2O5) piezoelectric composites were prepared by a solid state sintering technique. Effects of Nb2O5 addition on the microstructure, electrical, and mechanical properties of the PZT/ZnOw composites were investigated. With increasing Nb2O5 content, the grain size of the composites was reduced and the fracture mode changed from intergranular to intragranular gradually. Compared with the PZT/ZnOw composites, the dielectric, piezoelectric, and ferroelectric properties of the PZT/ZnOw–Nb2O5 composites were improved significantly, while mechanical properties were enhanced slightly. The optimum electrical and mechanical properties were achieved for the PZT/ZnOw composites modified with 0.75 wt% Nb2O5 sintered at 1150 °C, with dielectric permittivity εr, piezoelectric coefficient d33, planar electromechanical coupling kp, remnant polarization Pr, fracture toughness KIC, and flexural strength σf being on the order of 4930, 600 pC/N, 0.63, 29.2 μC/cm2, 1.56 MPa m1/2 and 130 MPa, respectively. The Nb2O5-modified PZT/ZnOw piezoelectric composites, with comparable electrical properties and improved mechanical properties than those of commercial PZT-5H ceramics, are promising candidates for further applications.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Da-Wei Wang
    • 1
  • Jie Yuan
    • 2
  • Hong-Bo Li
    • 1
  • Ran Lu
    • 1
  • Quan-Liang Zhao
    • 1
  • De-Qing Zhang
    • 1
  • Mao-Sheng Cao
    • 1
  1. 1.School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina
  2. 2.School of Information EngineeringCentral University for NationalitiesBeijingChina

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