Structure, dielectric and ferroelectric properties of lead free (K,Na)(Nb)O3-xBiErO3 piezoelectric ceramics

  • Muhammad Qadeer Awan
  • Javed Ahmad
  • Lasse Norén
  • Teng Lu
  • Yun Liu


The effect of BiErO3 (BE) as a doping material on the structural, dielectric and ferroelectric properties of (KNa)NbO3 ceramics was explored in this research. Co-existence of two phase regions was confirmed in the composition range at x = 0.5% and x = 1.0%. The addition of BE content led to a decrease of the grain size and the ceramics became denser. Bulk P–E hysteresis loops were obtained with a maximum polarization of P max = 30.56 µC/cm2 and a remnant polarization of P r = 25.10 µC/cm2, along with a coercive field of E c  ~ 11.26 kV/cm. The results revealed that a field strain value of ~ 0.26 for x = 0.5% of BE substitution was attained. This presents outstanding piezoelectric and dielectric properties.



M. Q. Awan acknowledged the Higher Education Commission Pakistan for providing funding through “Indigenous 5000 fellowship program” and 6 month research visit to Research school of chemistry, ANU Australia under IRSIP scheme. Author also would like to pay special thanks to all respected members of RSC, ANU, Australia for offering research amenities for this project and giving 2 months further funding to complete that research work.


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Authors and Affiliations

  1. 1.SSS Laboratory, Department of PhysicsBahauddin Zakariya UniversityMultanPakistan
  2. 2.Research School of ChemistryThe Australian National UniversityCanberraAustralia
  3. 3.GävleSweden

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