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Glass Physics and Chemistry

, Volume 42, Issue 1, pp 27–32 | Cite as

Study of polaron transport mechanisms in two transition metal ions doped borophosphate glasses

  • J. S. Ashwajeet
  • T. Sankarappa
  • R. Ramanna
  • T. Sujatha
Article
  • 65 Downloads

Abstract

Borophosphate glasses in the compositions, (B2O3)0.2 · (P2O5)0.3 · (V2O5) x · (CoO)0.5x , where x = 0.05, 0.1, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50 were synthesized at 1500 K by standard melt quenching method. Non-crystalline nature of the samples was confirmed by XRD studies. Room temperature density and dc electrical conductivity in the temperature range from 350 K to 625 K have been measured. Density decreased up to about 0.25 mole fractions of V2O5 and increased thereafter. Conductivity was almost constant up to 0.25 mole fractions of V2O5 and increased for higher amount of V2O5. Temperature variation of conductivity data has been analyzed using Mott’s small polaron hopping (SPH) model and, activation energy and Debye’s temperature were determined. Activation energy decreased with increase of V2O5 content. The data deviated from the Mott’s SPH model has been analyzed in view of variable range hopping models of Mott and Greaves and the density of states at Fermi level was determined. It is for the first time that borophosphate glasses doped with V2O5 and CoO were synthesized to study conductivity variation with temperature. The data analyzed using small polaron hopping and variable range hopping models.

Keywords

borophosphate glasses density conductivity activation energy density of states 

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References

  1. 1.
    Koudelka, L., Mošner, P., and Prok pková, P., Structure and properties of strontium–zinc borophosphate glasses, Phosphorus Res. Bull., 1999, vol. 10, pp. 582–587.CrossRefGoogle Scholar
  2. 2.
    Ducel, J.F. and Videau, J.J., Physical and chemical characterizations of sodium borophosphate glasses, Mater. Lett., 1992, vol. 13, nos. 4–5, pp. 271–274.CrossRefGoogle Scholar
  3. 3.
    Xie Guan Pang, Tien Yew Eeu, Pau Ming Leong, Wan Nurulhuda Wan Shamsuri, and Rosli Hussin, Structural and luminescence study of rare-earth and transition metal ions doped lead zinc borophosphate glasses, Adv. Mater. Res., 2014, vol. 895, pp. 280–283.CrossRefGoogle Scholar
  4. 4.
    Barde, R.V. and Waghuley, S.A., Transport and physical properties of V2O5–P2O5–B2O3 glasses doped with Dy2O3, J. Adv. Ceram., 2013, vol. 2, no. 3, pp. 246–251.CrossRefGoogle Scholar
  5. 5.
    Kyungseok Han, Chawon Hwang, Donghwan Kim, Donggun Gwoo, Taehee Kim, Wongyu Choi, Kyungbum Kee, Jonghwan Kim, and Bongki Ryu, Effects of substituting B2O3 for P2O5 on the structures and properties of V2O5–P2O5 glass systems, Electron. Mater. Lett., 2012, vol. 8, no. 6, pp. 655–658.CrossRefGoogle Scholar
  6. 6.
    Ouis, M.A., El-Batal, H.A., Azooz, M.A., and Abdelghany, A.M., Characterization of WO3-doped borophosphate glasses by optical, IR and ESR spectroscopic techniques before and after subjecting to gamma irradiation, Indian J. Pure Appl. Phys., 2013, vol. 51, pp. 11–17.Google Scholar
  7. 7.
    Kabi, S. and Ghosh, A., Correlation of structure and electrical conductivity of CdI2 doped silver borophosphate glass and nanocomposite, J. Phys. Chem. C, 2011, vol. 115, no. 19, pp. 9760–9766.CrossRefGoogle Scholar
  8. 8.
    Saudy, H.A., El Mosallamy, S., El Kameesy, S.U., Sheta, N., Mostafa, A.G., and Sallam, H.A., Mechanical, thermal and chemical durability behaviors of CdO–Bi2O3 boro-phosphate glasses containing Fe2O3, World J. Condens. Matter Phys., 2013, vol. 3, no. 1, pp. 9–13.CrossRefGoogle Scholar
  9. 9.
    Vijaya Kumar, B., Sankarappa, T., Santosh Kumar, Prashant Kumar, M., Sadashivaiah, P.J., and Ramakrishna Reddy, R., Dielectric properties and conductivity in CuO and MoO3 doped borophosphate glasses, Physica B (Amsterdam, Neth.), 2009, vol. 404, no. 20, pp. 3487–3492.CrossRefGoogle Scholar
  10. 10.
    Magistris, A., Chiodelli, G., and Duclot, M., Silver borophosphate glasses: Ion transport, thermal stability, and electrochemical behavior, Solid State Ionics, 1983, vols. 9–10, no. 1, pp. 611–615.CrossRefGoogle Scholar
  11. 11.
    Mott, N.F., Conduction in non-crystalline materials: III. Localized states in a pseudogap and near extremities of conduction and valence bands, Philos. Mag., 1969, vol. 19, no. 160, pp. 835–852.CrossRefGoogle Scholar
  12. 12.
    Austin, I.G. and Mott, N.F., Polarons in crystalline and non-crystalline materials, Adv. Phys., 1969, vol. 18, no. 71, pp. 41–102.CrossRefGoogle Scholar
  13. 13.
    Greaves, G.N., Small polaron conduction in V2O5–P2O5 glasses, J. Non-Cryst. Solids, 1973, vol. 11, no. 5, pp. 427–446.CrossRefGoogle Scholar
  14. 14.
    Vijaya Kumar, B., Sankarappa, T., Prashant Kumar, M., and Santosh Kumar, Electronic transport properties of mixed transition metal ions doped borophosphate glasses, J. Non-Cryst. Solids, 2009, vol. 355, nos. 4–5, pp. 229–234.CrossRefGoogle Scholar
  15. 15.
    Prashant Kumar, M. and Sankarappa, T., Dcconductivity in some alkali doped vanadotellurite glasses, Solid State Ionics, 2008, vol. 178, nos. 33–34, pp. 1719–1724.CrossRefGoogle Scholar
  16. 16.
    Sakata, H., Sega, K., and Chaudhuri, B.K., Multiphonon tunneling conduction in vanadium-cobalttellurite glasses, Phys. Rev. B: Condens. Matter, 1999, vol. 60, no. 5, pp. 3230–3236.CrossRefGoogle Scholar
  17. 17.
    Nagaraja, N., Sankarappa, T., and Prashant Kumar, M., Electrical conductivity studies in single and mixed alkali doped cobalt-borate glasses, J. Non-Cryst. Solids, 2008, vol. 354, no. 14, pp. 1503–1508.CrossRefGoogle Scholar
  18. 18.
    Annamalai, S., Bhatta, R.P., Pegg, I.L., and Dutta, B., Mixed transition-ion effect in the glass system: Fe2O3–MnO–TeO2, J. Non-Cryst. Solids, 2012, vol. 11, no. 358, pp. 1386–1390.Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • J. S. Ashwajeet
    • 1
  • T. Sankarappa
    • 1
  • R. Ramanna
    • 1
  • T. Sujatha
    • 1
  1. 1.Department of PhysicsGulbarga UniversityGulbarga, KarnatakaIndia

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