Articles
  • The properties of SBFTi-x ferroelectric ceramics
  • Wang Lingxua,*, Zhang Fengqingb, Guo Xiaodongc and Fan Suhuac
  • a School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China b School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, China c Shandong Women's University, Jinan, 250000, China
Abstract
BFO(BiFeO3)-SBTi(Sr2Bi4Ti5O18) composite ferroelectric ceramics(referred to as SBFTi-x) were prepared by Sr2Bi4Ti5O18 and BiFeO3, with the increasing of BFO content, compared to SBTi ceramics, Bi3+ and Fe3+ co-doped in A and B site cause the lattice distortion, which make SBFTi-x ceramics show the higher the remanent polarization and low leakage current density at room temperature. SBFTi-0.3 ceramic exhibits excellent ferroelectric properties at the electric field of 85kV/cm, the remanent polarization 2Pr and coercive field 2Ec is 18.66μC/cm2 and 77.7kV/cm respectively, the lowest leakage current density J= 2.34×10-6A/cm2. In addition, with the increase BFO content, the changes of oxygen concentration and built-in electric field make the leakage current mechanism of SBFTi-x ceramics turn into the Ohms transmission mechanism-based from the Space-charge limit for leading.

Keywords: SBFTi-x, Solid solution, Ferroelectric.

This Article

  • 2017; 18(11): 783-786

    Published on Nov 30, 2017