Effect of Cerium Doping on Microstructure and Dielectric Properties of BaTiO3 Ceramics

J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (8): 759-763.

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Effect of Cerium Doping on Microstructure and Dielectric Properties of BaTiO₃ Ceramics

Sabina Yasmin¹⁾, Shamima Choudhur¹⁾, M.A. Hakim²⁾, A.H. Bhuiyan³⁾, M.J. Rahman³⁾

1) Department of Physics, University of Dhaka, Dhaka-1000, Bangladesh
2) Materials Science Division, Atomic Energy Centre, Dhaka, Dhaka-1000, Bangladesh
3) Department of Physics, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh

Received:2010-08-23 Revised:2011-03-14 Online:2011-08-30 Published:2011-08-30
Contact: M.J. Rahman

Abstract

Abstract: A solid state reaction method was used to synthesize barium titanate (BT) and barium cerium titanate (BCT) ceramics at sintering temperature of 1473 K for 4 h. The effect of cerium (Ce) on the structure, microstructure and dielectric properties of BCT was investigated. The scanning electron microscopy (SEM) investigations revealed that the grain size increases with increasing Ce content. The X-ray diffraction (XRD) patterns showed mostly the BT phase, where the lattice parameter decreased with the addition of Ce. The temperature dependence of dielectric constant showed decrease in the phase transition temperature with higher Ce content. The dielectric constant decreased slightly with increasing frequency. The direct current (dc) density-voltage
characteristics of the ceramics showed ohmic behavior for both the BT and BCT. As the temperature increased, the dc resistivity of the ceramics decreased. The activation energy increased with increasing Ce content.

Key words: Cerium doped Ba_1-xCe_xTiO₃, Dielectric constant, Current density

Sabina Yasmin, Shamima Choudhur, M.A. Hakim, A.H. Bhuiyan, M.J. Rahman. Effect of Cerium Doping on Microstructure and Dielectric Properties of BaTiO₃ Ceramics[J]. J Mater Sci Technol, 2011, 27(8): 759-763.

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Effect of Cerium Doping on Microstructure and Dielectric Properties of BaTiO₃ Ceramics

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