Skip to main content
SpringerLink
Log in

Thermal studies on iron titanate spinel

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

Thermogravimetry and X-ray analysis show that the iron titanate spinel sample is nonstoichiometric and has the formula Fe1.76Ti1.12O4. On heating in air below 573 K, it undergoes surface oxidation and on further heating DTA and TG show that it undergoes bulk oxidation in three stages. X-ray analysis and resistivity measurements show that while octahedral Fe2+ ions are oxidised, the spinel structure is retained and during Fe 2+tet oxidation a metastable phase is formed and when the oxidation is complete, the pseudobrookite phase is formed.

Zusammenfassung

Durch TG und Röntgendiffraktion zeigte sich, da\ eine EisentitanatSpinellprobe keine stöchiometrische Zusammensetzung, sondern die Formel Fe1.76Ti1.12O4 besitzt. Bei Erhitzen in Luft wird die Probe unterhalb 573 K an der OberflÄche oxidiert. Bei weiterem Erhitzen zeigen DTA- und TG-Daten eine dreistufige Oxidation im gesamten Volumen. Röntgendiffraktions- und Widerstandsuntersuchungen zeigen, da\ bei der Oxidation von oktaedrischen Fe2+-Ionen die Spinellstruktur beibehalten wird und bei der Fe 2+tet Oxidation eine metastabile Phase und nach vollstÄndiger Oxidation eine Pseudobrookitphase gebildet wird.

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

Similar content being viewed by others

References

  1. B. Gillot, F. Chassagneux and A. Rousset, J. Solid State Chem., 38 (1981) 219.

    Google Scholar 

  2. B. Gillot, M. El Guendouzi, P. Tailhades and A. Rousset, Reactivity of Solids, 1 (1986) 139.

    Google Scholar 

  3. B. Gillot, F. Jemmali, L. Clerc, and A. Rousset, Reactivity of Solids, 2 (1986) 95.

    Google Scholar 

  4. B. Gillot, F. Jemmali and A. Rousset, J. Solid State Chem., 72 (1988) 209.

    Google Scholar 

  5. K.S. De, J. Ghose and K.S.R.C Murthy, J. Solid State Chem., 43 (1982) 261.

    Google Scholar 

  6. N. Padmanaban, B. N. Avasthi, and J. Ghose, J. Solid State Chem., 81 (1989) 250.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology, Pin 721 302, Kharagpur, India

    D. Basak & J. Ghose

Authors
  1. D. Basak
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. Ghose
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

The authors wish to thank DST for financial sanction for this work and Durga Basak wishes to thank DST for awarding JRF. The authors also wish to thank Dr. A. K. Kar for his encouragement and help throughout this work.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Basak, D., Ghose, J. Thermal studies on iron titanate spinel. Journal of Thermal Analysis 37, 935–943 (1991). https://doi.org/10.1007/BF01932791

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01932791

Keywords

Search

Navigation