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Thermodynamic properties of the La2O3-HfO2 system at high temperatures. / Stolyarova, V.L.; Vorozhtcov, V.A.; Lopatin, S.I.; Shilov, A.L.

In: Thermochimica Acta, Vol. 668, 10.10.2018, p. 87-95.

Research output: Contribution to journal › Article › peer-review

Harvard

Stolyarova, VL, Vorozhtcov, VA, Lopatin, SI & Shilov, AL 2018, 'Thermodynamic properties of the La2O3-HfO2 system at high temperatures', Thermochimica Acta, vol. 668, pp. 87-95. https://doi.org/10.1016/j.tca.2018.08.014

APA

Stolyarova, V. L., Vorozhtcov, V. A., Lopatin, S. I., & Shilov, A. L. (2018). Thermodynamic properties of the La2O3-HfO2 system at high temperatures. Thermochimica Acta, 668, 87-95. https://doi.org/10.1016/j.tca.2018.08.014

Vancouver

Stolyarova VL, Vorozhtcov VA, Lopatin SI, Shilov AL. Thermodynamic properties of the La2O3-HfO2 system at high temperatures. Thermochimica Acta. 2018 Oct 10;668:87-95. https://doi.org/10.1016/j.tca.2018.08.014

Author

Stolyarova, V.L. ; Vorozhtcov, V.A. ; Lopatin, S.I. ; Shilov, A.L. / Thermodynamic properties of the La2O3-HfO2 system at high temperatures. In: Thermochimica Acta. 2018 ; Vol. 668. pp. 87-95.

BibTeX

@article{e27add4984cd4cf8afd5775457893b5f,
title = "Thermodynamic properties of the La2O3-HfO2 system at high temperatures",
abstract = "The La 2O 3-HfO 2 system is a base for many advanced materials used in high temperature technologies and nuclear industry. Information on vaporization processes and thermodynamic properties of ceramics based on the La 2O 3-HfO 2 system is important to prevent the La 2O 3 selective vaporization during their synthesis or usage. The study was carried out by the Knudsen effusion mass spectrometric method. At 2337 K LaO and O were the main vapor species over the samples in the La 2O 3-HfO 2 system. The dependence of the La 2O 3 activities on composition in the La 2O 3-HfO 2 system was obtained by the differential mass spectrometric method. The HfO 2 activities, excess Gibbs energies and Gibbs energies of mixing were evaluated in the solid solutions of the La 2O 3-HfO 2 system at 2337 K using the Gibbs-Duhem equation and showed significant negative deviations from ideality. The solid solution presumably with the pyrochlore structure was characterized with the strongest negative deviations. ",
keywords = "High temperature mass spectrometry, Oxide ceramics, Thermodynamics, Vaporization, PRESSURE, ZIRCONIA, HAFNIA, OXIDE SYSTEMS, VAPORIZATION, EFFUSION MASS-SPECTROMETRY, LANTHANUM, CERAMICS",
author = "V.L. Stolyarova and V.A. Vorozhtcov and S.I. Lopatin and A.L. Shilov",
year = "2018",
month = oct,
day = "10",
doi = "10.1016/j.tca.2018.08.014",
language = "English",
volume = "668",
pages = "87--95",
journal = "Thermochimica Acta",
issn = "0040-6031",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Thermodynamic properties of the La2O3-HfO2 system at high temperatures

AU - Stolyarova, V.L.

AU - Vorozhtcov, V.A.

AU - Lopatin, S.I.

AU - Shilov, A.L.

PY - 2018/10/10

Y1 - 2018/10/10

N2 - The La 2O 3-HfO 2 system is a base for many advanced materials used in high temperature technologies and nuclear industry. Information on vaporization processes and thermodynamic properties of ceramics based on the La 2O 3-HfO 2 system is important to prevent the La 2O 3 selective vaporization during their synthesis or usage. The study was carried out by the Knudsen effusion mass spectrometric method. At 2337 K LaO and O were the main vapor species over the samples in the La 2O 3-HfO 2 system. The dependence of the La 2O 3 activities on composition in the La 2O 3-HfO 2 system was obtained by the differential mass spectrometric method. The HfO 2 activities, excess Gibbs energies and Gibbs energies of mixing were evaluated in the solid solutions of the La 2O 3-HfO 2 system at 2337 K using the Gibbs-Duhem equation and showed significant negative deviations from ideality. The solid solution presumably with the pyrochlore structure was characterized with the strongest negative deviations.

AB - The La 2O 3-HfO 2 system is a base for many advanced materials used in high temperature technologies and nuclear industry. Information on vaporization processes and thermodynamic properties of ceramics based on the La 2O 3-HfO 2 system is important to prevent the La 2O 3 selective vaporization during their synthesis or usage. The study was carried out by the Knudsen effusion mass spectrometric method. At 2337 K LaO and O were the main vapor species over the samples in the La 2O 3-HfO 2 system. The dependence of the La 2O 3 activities on composition in the La 2O 3-HfO 2 system was obtained by the differential mass spectrometric method. The HfO 2 activities, excess Gibbs energies and Gibbs energies of mixing were evaluated in the solid solutions of the La 2O 3-HfO 2 system at 2337 K using the Gibbs-Duhem equation and showed significant negative deviations from ideality. The solid solution presumably with the pyrochlore structure was characterized with the strongest negative deviations.

KW - High temperature mass spectrometry

KW - Oxide ceramics

KW - Thermodynamics

KW - Vaporization

KW - PRESSURE

KW - ZIRCONIA

KW - HAFNIA

KW - OXIDE SYSTEMS

KW - VAPORIZATION

KW - EFFUSION MASS-SPECTROMETRY

KW - LANTHANUM

KW - CERAMICS

UR - http://www.scopus.com/inward/record.url?scp=85052300113&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/thermodynamic-properties-la2o3hfo2system-high-temperatures

U2 - 10.1016/j.tca.2018.08.014

DO - 10.1016/j.tca.2018.08.014

M3 - Article

VL - 668

SP - 87

EP - 95

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

ER -

ID: 33774712