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E. Wul and PowdMult, “An Interactive Powder Diffraction Data Interpretation and Index Program,” version 2.1, School of Physical Science, Flinders University of South Australia, Bedford Park, S.A. 5042, Australia.

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• TITLE: Structural and Electrical Characteristics of Ba(Fe0.5Nb0.5)O3-SrTiO3 Ceramic System

  AUTHORS: Narendra Kumar Singh, Pritam Kumar, Ajay Kumar Sharma, Ram Naresh Prasad Choudhary

  KEYWORDS: Dielectrics, Perovskite Oxides, X-Ray Diffraction, Scanning Electron Micrograph

  JOURNAL NAME: Materials Sciences and Applications, Vol.2 No.11, November 16, 2011

  ABSTRACT: A complex structure of barium iron niobate, Ba(Fe0.5Nb0.5)O3 (BFN) and strontium titanate SrTiO3 (ST) was fabricated by a solid-state reaction method. The phase formation of Ba(Fe0.5Nb0.5)O3-SrTiO3 was checked using X-ray diffraction (XRD) technique. The X-ray structural analysis of BFN and BFN-ST ceramics, showed the formation of single-phase compound in the monoclinic system, which is a distorted structure of an ideal cubic perovskite. Careful examination of microstructures of the individual compounds of the system was done by the scanning electron micrograph (SEM), and confirms the polycrystalline nature of the systems. Detailed studies of dielectric and electrical impedance properties of the systems in a wide range of frequency (100Hz - 5MHz) and different temperatures (30°C-285°C) showed that these properties are strongly dependent on temperature and frequency.