Journal of Materials Science

, Volume 46, Issue 21, pp 6871–6876 | Cite as

Construction of new morphotropic phase boundary in 0.94(K0.4−xNa0.6BaxNb1−xZrx)O3–0.06LiSbO3 lead-free piezoelectric ceramics

  • Wenfeng Liang
  • Wenjuan Wu
  • Dingquan XiaoEmail author
  • Jianguo Zhu
  • Jiagang Wu


0.94(K0.4−xNa0.6BaxNb1−xZrx)O3–0.06LiSbO3 ceramics were prepared by conventional technique, and the effect of BaZrO3 on the phase transitions, dielectric, ferroelectric, and piezoelectric properties of the ceramics were investigated. The phase transitions for the ceramics were determined by the temperature dependence of dielectric properties and X-ray diffraction patterns. BaZrO3 changes the symmetry of the ceramics from tetragonal dominant phase with x = 0–0.06 to rhombohedral phase with x = 0.07–0.09. The phase transition near room temperature for the composition with x ~ 0.06 is different from previously reported phase transition between orthorhombic and tetragonal phases. It is suggested that a new morphotropic phase boundary (MPB) is constructed with both rhombohedral–orthorhombic and orthorhombic–tetragonal phase transitions near room temperature, and the enhanced piezoelectric properties (d33 = 344 pC/N and kP = 32.4% with x = 0.06) are obtained. The results indicate that the construction of new MPB is of significance for further development of KNN-based ceramics.


Piezoelectric Property Sb2O3 Morphotropic Phase Boundary Rhombohedral Phase LiTaO3 



This study was supported by National Science Foundation of China (NSFC Nos. 50772068 and 50972095) and Foundation of Doctor Training Program in University and College in China (Nos. 20030610035 and 20080610020).


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Wenfeng Liang
    • 1
  • Wenjuan Wu
    • 1
  • Dingquan Xiao
    • 1
    Email author
  • Jianguo Zhu
    • 1
  • Jiagang Wu
    • 1
  1. 1.Department of Materials ScienceSichuan UniversityChengduChina

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