Journal of Materials Science

, Volume 42, Issue 7, pp 2476–2485 | Cite as

Characterization of electrical behaviour of Si modified BaSnO3 electroceramics using impedance analysis

  • Ashok Kumar
  • R. N. P. Choudhary


The compounds BaSn1−x Si x O3 (x = 0–15 mol%) have been prepared by high temperature solid-state reaction route. Powder X-ray diffraction pattern of the samples reveal the formation of a single phase solid solution. It was found that single phase compositions have a cubic crystal structure similar to that of pure barium stannate at room temperature. The a.c. impedance analysis has been carried out in the frequency range 100 Hz–1 MHz for temperature ranging from 300 K to 750 K. Analysis of a.c. impedance data using the complex impedance plane gives the a.c. and d.c. resistance of negative temperature resistance of coefficient (NTCR) electroceramics. Complex impedance plane and complex electric modulus formalism are employed to determine the inhomogeneous nature of the electroceramics. This reveals the presence of single elements in the equivalent circuit at elevated temperature. Grain effects are more prominent than that of grain boundary effect at elevated temperature in the material matrix. The electrical conductivity increases sharply with rise in temperature at elevated temperature due to the thermally activated cations. Master modulus analysis provided an evidence of non-exponential type conductivity relaxation occurring in the materials at higher temperatures.


Modulus Formalism Equivalent Electrical Circuit High Frequency Side Complex Impedance Plane Single Phase Solid Solution 
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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Metallurgy and Materials EngineeringIndian Institute of TechnologyKharagpurIndia
  2. 2.Department of Physics and MeteorologyIndian Institute of TechnologyKharagpurIndia

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