Skip to main content
SpringerLink
Log in

Relative thermodynamic stabilities of constituent oxides of highT c superconductors

  • International Conference On Superconductivity—III
  • Published:
Bulletin of Materials Science Aims and scope Submit manuscript

Abstract

A thermodynamic scale of the relative stabilities of constituent oxides can help the choice of stoichiometric multi-component compositions and can provide guidance for judicious selection of heat-treatment conditions for high-T c superconductors. A thermodynamic analysis was undertaken to study Y2O3-BaO-CuO, BaO-K2O-Bi2O3 and La2O3-SrO-NiO systems. The relative stability of the oxides was expressed in terms of two ratios,S v andS p computed using free-energy of formation and vapour pressure data. CuO, Bi2O3 and NiO were taken as reference oxides for YBa2Cu3O7\t-\gd, Ba0·6K0·4BiO3 and La1·9Sr0·1NiO4 respectively. Thermodynamically, the reference oxide was found to be the least stable amongst the constituent oxides in each of these systems.

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

  • Cava R Jet al 1988Nature (London) 332 814

    Article  CAS  Google Scholar 

  • Kubaschewski O and Alcock C G 1979Metallurgical Thermochemistry (New York: Pergamon) Chapter V.

    Google Scholar 

  • Lindemer T B, Hunley J F, Gates J E, Sulton A L Jr., Brynestad J, Hubbard R and Gallagher P K 1989J. Am. Ceram. Soc. 72 1775

    Article  CAS  Google Scholar 

  • Mattheiss I F, Gyorgy E M and Johnson D W 1988Phys. Rev. 37 3745

    Article  CAS  Google Scholar 

  • Rao C N R, Ganguli A K and Nagarajan R 1989Pramana — J. Phys. 32 L177

  • Tretyakov Yu D 1990 International Conference on Superconductivity, Bangalore (Programme and Abstracts)

  • Williams R S and Chaudhury S 1988Chemistry of high-temperature superconductors II (eds) D L Nelson and T F George (Washington: American Chemical Society) Chapter 22

    Google Scholar 

  • Wu M Ket al 1987Phys. Rev. Lett. 58 908

    Article  CAS  Google Scholar 

Download references

Author information

Author notes

  1. SK Sundaram

    Present address: New York State College of Ceramics, Alfred University, 14802, Alfred, New York, USA

Authors and Affiliations

  1. Tata Research Development and Design Centre, 1, Mangaldas Road, 411 001, Pune, India

    SK Sundaram

Authors
  1. SK Sundaram
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Sundaram, S. Relative thermodynamic stabilities of constituent oxides of highT c superconductors. Bull. Mater. Sci. 14, 993–997 (1991). https://doi.org/10.1007/BF02747465

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02747465

Keywords

Search

Navigation