Articles
  • Effect of microwave processing on structural, dielectric and ferroelectric properties of calcium-doped BaTiO3 ceramics
  • Soniaa, R.K. Patela, C. Prakashb and P. Kumarc,*
  • a Department of Chemistry, National Institute of Technology, Rourkela - 769008, India b Directorate of IE & IPR, DRDO, DRDO Bhawan, Rajaji Marg, New Delhi-110011, India c Department of Physics, National Institute of Technology, Rourkela - 769008, India
Abstract
Calcium-doped barium titanate, Ba(1−x)CaxTiO3 (where x = 0.02,0.04,0.06 & 0.08)/BCT1,BCT2, BCT3 & BCT4, ferroelectric ceramics were synthesized by a microwave processing technique. For the formation of a single perovskite phase with a dense grain morphology, microwave sintering temperature was optimized at 1100 oC for 1 h. SEM characterization of the microwave sintered BCT samples showed dense and homogeneous packing of sub-micrometer size grains. The BCT2 system showed the highest room temperature (RT) dielectric constant (εr). The dielectric property vs. temperature behavior revealed a diffuse phase transition nature. The occurrence of polarization vs. electric field (P-E) loops confirmed the ferroelectric nature of the microwave sintered BCT samples.

Keywords: BCT, Ferroelectric materials, Dielectric properties, Perovskite, Diffusivity

This Article

  • 2011; 12(6): 634-639

    Published on Dec 31, 2011