Sintering Behavior and Micro Structure Development of Ba Doped BiFeO3
Rubayyat Mahbub1, Md. Fakhrul Islam2

1Rubayyat Mahbub, Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, (Dhaka), Bangladesh.
2Dr. Md. Fakhrul Islam, Department of Glass and Ceramic Engineering, Bangladesh University of Engineering and Technology, (Dhaka), Bangladesh.
Manuscript received on 10 May 2014 | Revised Manuscript received on 20 May 2014 | Manuscript Published on 30 May 2014 | PP: 97-102 | Volume-3 Issue-12, May 2014 | Retrieval Number: L16690531214/14©BEIESP
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Abstract: The main focus of this research was to investigate the role of Ba doping on the sintering behavior and microstructure development of BiFeO3 (BFO) ceramic. Single phase Bi1-xBa.xFeO3 samples (x= 0.1, 0.2 and 0.3) were synthesized by the conventional solid-state reaction method. The doped samples were then sintered at temperatures in the range of 850-900oC for both 1 and 2 hours of holding time. Thereafter field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) techniques were used to examine the phase and structure of the samples. Phase analysis by X–ray diffraction (XRD) indicated that single phase perovskite structure was formed with possible increment in lattice parameter with increasing Ba doping. Moreover, microstructural investigation using the field emission scanning electron microscope (FESEM) showed that an increase in Ba concentration in Bi1-xBa.xFeO3 controls excessive grain growth and reduces the average grain size from 10 µm in Bi0.9Ba0.1FeO3 to 0.58 µm in Bi0.7Ba0.3FeO3 when sintered at 900oC for 2h. However, percent theoretical density (%TD) above 95% was attained in this research for all compositions.
Keywords: Bismuth Ferrite, Barium, Doping, Sintering, Densification, Microstructure.

Scope of the Article: Sustainable Structures