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Dielectric properties of Ba3Sr2DyTi3V7O30 ceramics

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Central European Journal of Physics

Abstract

A polycrystalline sample, Ba3Sr2DyTi3V7O30, with tungsten bronze structure was prepared by a mixed-oxide method at high temperature (950°C). Preliminary structural analysis of the compound showed an orthorhombic crystal structure at room temperature. Surface morphology of the compound was studied by scanning electron microscopy. The dielectric anomaly at 321°C may be attributed to the ferro-paraelectric phase transitions. This was also confirmed from the appearance of a hysteresis loop. The nature of variation of the ac conductivity and value of activation energy at different temperature regions, suggest that the conduction process is of mixed-type (i.e., ionic-polaronic and space charge generated from the oxygen ion vacancies).

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Authors and Affiliations

  1. Department of Physics, Betnoti College Betnoti, Mayurbhanj, Orissa, India

    Priyadarshini S. Sahoo

  2. Department of Physics, D.N. College, Itanagar, Arunachal Pradesh, India

    Anuradha Panigrahi

  3. Department of Physics & Meteorology, IIT, Kharagpur, 721302, India

    Sunanda K. Patri & Rasm N. P. Choudhary

Authors
  1. Priyadarshini S. Sahoo
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  2. Anuradha Panigrahi
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  3. Sunanda K. Patri
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  4. Rasm N. P. Choudhary
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Corresponding author

Correspondence to Rasm N. P. Choudhary.

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Sahoo, P.S., Panigrahi, A., Patri, S.K. et al. Dielectric properties of Ba3Sr2DyTi3V7O30 ceramics. centr.eur.j.phys. 8, 639–642 (2010). https://doi.org/10.2478/s11534-009-0130-9

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  • DOI: https://doi.org/10.2478/s11534-009-0130-9

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