Standard

Thermodynamic properties of lanthanum, neodymium, gadolinium hafnates (Ln2Hf2O7) : Calorimetric and KEMS studies. / Vorozhtcov, Viktor A.; Stolyarova, Valentina L.; Chislov, Mikhail V.; Zvereva, Irina A.; Simonenko, Elizaveta P.; Simonenko, Nikolay P.

In: Journal of Materials Research, Vol. 34, No. 19, 14.10.2019, p. 3326-3336.

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

Harvard

Vorozhtcov, VA, Stolyarova, VL, Chislov, MV, Zvereva, IA, Simonenko, EP & Simonenko, NP 2019, 'Thermodynamic properties of lanthanum, neodymium, gadolinium hafnates (Ln2Hf2O7): Calorimetric and KEMS studies', Journal of Materials Research, vol. 34, no. 19, pp. 3326-3336. https://doi.org/10.1557/jmr.2019.206

APA

Vorozhtcov, V. A., Stolyarova, V. L., Chislov, M. V., Zvereva, I. A., Simonenko, E. P., & Simonenko, N. P. (2019). Thermodynamic properties of lanthanum, neodymium, gadolinium hafnates (Ln2Hf2O7): Calorimetric and KEMS studies. Journal of Materials Research, 34(19), 3326-3336. https://doi.org/10.1557/jmr.2019.206

Vancouver

Vorozhtcov VA, Stolyarova VL, Chislov MV, Zvereva IA, Simonenko EP, Simonenko NP. Thermodynamic properties of lanthanum, neodymium, gadolinium hafnates (Ln2Hf2O7): Calorimetric and KEMS studies. Journal of Materials Research. 2019 Oct 14;34(19):3326-3336. https://doi.org/10.1557/jmr.2019.206

Author

Vorozhtcov, Viktor A. ; Stolyarova, Valentina L. ; Chislov, Mikhail V. ; Zvereva, Irina A. ; Simonenko, Elizaveta P. ; Simonenko, Nikolay P. / Thermodynamic properties of lanthanum, neodymium, gadolinium hafnates (Ln2Hf2O7) : Calorimetric and KEMS studies. In: Journal of Materials Research. 2019 ; Vol. 34, No. 19. pp. 3326-3336.

BibTeX

@article{aa3dd414fbe24afdbfcef1fe76b43986,
title = "Thermodynamic properties of lanthanum, neodymium, gadolinium hafnates (Ln2Hf2O7): Calorimetric and KEMS studies",
abstract = "Using the data obtained by Knudsen effusion mass spectrometry, the standard formation thermodynamic properties of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 were calculated in the present study at high temperatures. Based on the results obtained, it was shown that the standard formation Gibbs energies of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 from the elements at the temperature 2445 K were consistent with the empirical rule concerning decrease of stability of pyrochlore hafnate phase with decrease in lanthanoid ionic radius. The La2Hf2O7 and Gd2Hf2O7 heat capacities were obtained in the present study by differential scanning calorimetry. These data were used along with those found earlier to evaluate the standard formation Gibbs energies of La2Hf2O7 and Gd2Hf2O7 from the elements at the temperature 298 K, which equal (-3937 ± 10) kJ/mol and (-3895 ± 10) kJ/mol, respectively. The thermodynamic properties of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 estimated in a wide temperature range allowed consideration of reliability of data available in the literature.",
keywords = "calorimetry, ceramic, mass spectroscopy",
author = "Vorozhtcov, {Viktor A.} and Stolyarova, {Valentina L.} and Chislov, {Mikhail V.} and Zvereva, {Irina A.} and Simonenko, {Elizaveta P.} and Simonenko, {Nikolay P.}",
year = "2019",
month = oct,
day = "14",
doi = "10.1557/jmr.2019.206",
language = "English",
volume = "34",
pages = "3326--3336",
journal = "Journal of Materials Research",
issn = "0884-2914",
publisher = "Cambridge University Press",
number = "19",

}

RIS

TY - JOUR

T1 - Thermodynamic properties of lanthanum, neodymium, gadolinium hafnates (Ln2Hf2O7)

T2 - Calorimetric and KEMS studies

AU - Vorozhtcov, Viktor A.

AU - Stolyarova, Valentina L.

AU - Chislov, Mikhail V.

AU - Zvereva, Irina A.

AU - Simonenko, Elizaveta P.

AU - Simonenko, Nikolay P.

PY - 2019/10/14

Y1 - 2019/10/14

N2 - Using the data obtained by Knudsen effusion mass spectrometry, the standard formation thermodynamic properties of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 were calculated in the present study at high temperatures. Based on the results obtained, it was shown that the standard formation Gibbs energies of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 from the elements at the temperature 2445 K were consistent with the empirical rule concerning decrease of stability of pyrochlore hafnate phase with decrease in lanthanoid ionic radius. The La2Hf2O7 and Gd2Hf2O7 heat capacities were obtained in the present study by differential scanning calorimetry. These data were used along with those found earlier to evaluate the standard formation Gibbs energies of La2Hf2O7 and Gd2Hf2O7 from the elements at the temperature 298 K, which equal (-3937 ± 10) kJ/mol and (-3895 ± 10) kJ/mol, respectively. The thermodynamic properties of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 estimated in a wide temperature range allowed consideration of reliability of data available in the literature.

AB - Using the data obtained by Knudsen effusion mass spectrometry, the standard formation thermodynamic properties of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 were calculated in the present study at high temperatures. Based on the results obtained, it was shown that the standard formation Gibbs energies of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 from the elements at the temperature 2445 K were consistent with the empirical rule concerning decrease of stability of pyrochlore hafnate phase with decrease in lanthanoid ionic radius. The La2Hf2O7 and Gd2Hf2O7 heat capacities were obtained in the present study by differential scanning calorimetry. These data were used along with those found earlier to evaluate the standard formation Gibbs energies of La2Hf2O7 and Gd2Hf2O7 from the elements at the temperature 298 K, which equal (-3937 ± 10) kJ/mol and (-3895 ± 10) kJ/mol, respectively. The thermodynamic properties of La2Hf2O7, Nd2Hf2O7, and Gd2Hf2O7 estimated in a wide temperature range allowed consideration of reliability of data available in the literature.

KW - calorimetry

KW - ceramic

KW - mass spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85069223983&partnerID=8YFLogxK

U2 - 10.1557/jmr.2019.206

DO - 10.1557/jmr.2019.206

M3 - Article

AN - SCOPUS:85069223983

VL - 34

SP - 3326

EP - 3336

JO - Journal of Materials Research

JF - Journal of Materials Research

SN - 0884-2914

IS - 19

ER -

ID: 52206270