Skip to main content
SpringerLink
Log in

Effect of Oxygen Pressure on Phase Equilibria in the Lu–Mn–O System

  • Published:
Glass Physics and Chemistry Aims and scope Submit manuscript

Abstract

The heterogeneous equilibria attained during thermal dissociation and hydrogen reduction of LuMnO3 and LuMn2O5 are investigated using the static method (vacuum circulation setup) and X-ray powder diffraction analysis of quenched solid phases. It is found that the dissociation of LuMn2O5 proceeds in three stages. At the low-oxygen boundary of the homogeneity region of LuMn2O5, this compound dissociates into LuMnO3 and Mn3O4 with the liberation of oxygen. Upon reduction, LuMnO3 dissociates with the formation of Lu2O3 and MnO and the liberation of oxygen. Equations for the dissociation and reduction reactions of LuMn2O5 and LuMnO3 are derived, and mass balance equations for these processes are written. A fragment of the isothermal section of the phase diagram of the Lu–Mn–O system at a temperature of 900°C is constructed in the “composition–oxygen pressure” coordinates.

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. Vedmid', L.B., Titova, S.G., and Golikov, Yu.V., Subsolidus Phase Diagrams of the Yb-Mn-O and Lu-Mn-O Systems, Zh. Fiz. Khim., 2001, vol. 75, no. 6, pp. 1112–1124.

    Google Scholar 

  2. Abrahams, S.C. and Bernstein, J.L., Crystal Structure of Paramagnetic DyMn2O5 at 298 K, J. Chem. Phys., 1967, vol. 46, no. 10, pp. 3776–3782.

    Google Scholar 

  3. Portnoi, K.I. and Timofeeva, N.I., Kislorodnye soedineniya redkozemel'nykh elementov (Oxygen-Containing Compounds of Rare-Earth Elements), Moscow: Metallurgiya, 1986.

    Google Scholar 

  4. Yankin, A.M., Balakirev, V.F., Vedmid', L.B., and Fedorova, O.M., Static Method of Studying Heterogeneous Equilibria, Zh. Fiz. Khim., 2003, vol. 77, no. 11, pp. 2108–2111.

    Google Scholar 

  5. Balakirev, V.F., Barkhatov, V.P., Golikov, Yu.V., and Maizel', S.G., Manganity: Ravnovesnye i metastabil'nye sostoyaniya (Manganites: Equilibrium and Metastable States), Yekaterinburg: Ural. Otd. Ross. Akad. Nauk, 2000.

    Google Scholar 

  6. Tret'yakov, Yu.D., Khimiya nestekhiometricheskikh okislov (The Chemistry of Nonstochiometric Oxides), Moscow: Moscow State University, 1974.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. State Institute of Metallurgy, Ural Division, Russian Academy of Sciences, ul. Amundsena 101, Yekaterinburg, 620016, Russia

    L. B. Vedmid', V. F. Balakirev, A. M. Yankin, Yu. V. Golikov & O. M. Fedorova

Authors
  1. L. B. Vedmid'
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. F. Balakirev
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. M. Yankin
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Yu. V. Golikov
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. O. M. Fedorova
    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

Vedmid', L.B., Balakirev, V.F., Yankin, A.M. et al. Effect of Oxygen Pressure on Phase Equilibria in the Lu–Mn–O System. Glass Physics and Chemistry 30, 345–348 (2004). https://doi.org/10.1023/B:GPAC.0000038708.77042.9f

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/B:GPAC.0000038708.77042.9f

Keywords

Search

Navigation