Skip to main content
SpringerLink
Log in

Electrical properties of polycrystalline TiO2. Prolonged oxidation kinetics

  • Original Paper
  • Published:
Ionics Aims and scope Submit manuscript

Abstract

The equilibration kinetics for polycrystalline TiO2 was monitored during prolonged oxidation at 1,323 K and p(O2)=75 kPa using the measurements of the electrical conductivity and thermoelectric power. The determined kinetic data indicate the presence of two kinetics regimes; the Regime I (rapid kinetics) and the Regime II (slow kinetics). The prolonged oxidation of TiO2 is considered in terms of the formation of Ti vacancies at the surface and their subsequent transport into the bulk. This effect, also observed for TiO2 single crystal, allows to obtain p-type TiO2 without the incorporation of acceptor-type foreign ions into the TiO2 lattice.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

  1. Nowotny J, Bak T, Burg T (2007) Electrical properties of polycrystalline TiO2 at elevated temperatures. Electrical conductivity. Phys Status Solidi B (early view doi:10.1002/pssb.200642514)

  2. Nowotny J, Bak T, Burg T (2007) Electrical properties of polycrystalline TiO2. Thermoelectric power. Int J Ionics (in press)

  3. Nowotny J, Bak T, Burg T (2007) Electrical properties of polycrystalline TiO2. Equilibration kinetics. Int J Ionics (this issue)

  4. Nowotny MK, Bak T, Nowotny J, Sorrell CC (2005) Phys Status Solidi B 242:R88–R90

    Article  CAS  Google Scholar 

  5. Kofstad P (1972) Electrical conductivity, diffusion and nonstoichiometry of binary metal oxides. Wiley, New York

    Google Scholar 

  6. Bak T, Burg T, Kang S-JL, Nowotny J, Rekas M, Shepard L, Sorrell CC, Vance ER, Yoshida Y, Yamawaki M (2003) J Phys Chem Solids 64:1089

    Article  CAS  Google Scholar 

  7. Nowotny J, Bak T, Sorrell CC, Sheppard LR (2005) In: Nowotny J, Sorrell CC (eds) Materials and devices for energy conversion. Woodhead, Cambridge, pp 84–116

    Google Scholar 

  8. Baumard JF, Tani E (1977) Phys Status Solidi 39:373–380

    Article  CAS  Google Scholar 

Download references

Acknowledgements

The present work was supported by the Australian Research Council, Rio Tinto, Brickworks, Mailmasters and Sialon Ceramics.

Author information

Authors and Affiliations

  1. Centre for Materials Research in Energy Conversion, School of Materials Science and Engineering, University of New South Wales, Sydney, NSW, 2052, Australia

    J. Nowotny, T. Bak & T. Burg

Authors
  1. J. Nowotny
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. T. Bak
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. T. Burg
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to J. Nowotny.

Additional information

This project was performed as part of the University of New South Wales Research and Development programme on solar-hydrogen.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Nowotny, J., Bak, T. & Burg, T. Electrical properties of polycrystalline TiO2. Prolonged oxidation kinetics. Ionics 13, 79–82 (2007). https://doi.org/10.1007/s11581-007-0076-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11581-007-0076-0

Keywords

Search

Navigation