TY - JOUR

T1 - Samarium zirconate: thermodynamics and vaporization at high temperatures

AU - Ворожцов, Виктор Алексеевич

AU - Столярова, Валентина Леонидовна

AU - Лопатин, Сергей Игоревич

AU - Шугуров, Сергей Михайлович

AU - Симоненко, Елизавета Петровна

AU - Симоненко, Николай Петрович

N1 - Publisher Copyright: © 2021

PY - 2021/6

Y1 - 2021/6

N2 - The purpose of the present research was to study vaporization processes and thermodynamic properties of samarium zirconate with the pyrochlore structure. The Sm 2Zr 2O 7 sample was synthesized by the glycol-citrate method with the confirmation of its pyrochlore structure using X-ray phase analysis, infrared spectroscopy, and scanning electron microscopy. The thermodynamic properties and vaporization processes of samarium zirconate were examined by the high temperature mass spectrometric method at temperatures 2299−2730 K. The data obtained in the present study for the first time allowed determination of the Gibbs energy of formation of samarium zirconate from the pure oxides at 2460 K, which was equal to -115.7 kJ/mol, and, as a consequence, the values of the Gibbs energy and enthalpy of formation from the pure oxides at the temperature 298.15 K, which were equal to -130.5 kJ/mol and -131.4 kJ/mol, respectively.

AB - The purpose of the present research was to study vaporization processes and thermodynamic properties of samarium zirconate with the pyrochlore structure. The Sm 2Zr 2O 7 sample was synthesized by the glycol-citrate method with the confirmation of its pyrochlore structure using X-ray phase analysis, infrared spectroscopy, and scanning electron microscopy. The thermodynamic properties and vaporization processes of samarium zirconate were examined by the high temperature mass spectrometric method at temperatures 2299−2730 K. The data obtained in the present study for the first time allowed determination of the Gibbs energy of formation of samarium zirconate from the pure oxides at 2460 K, which was equal to -115.7 kJ/mol, and, as a consequence, the values of the Gibbs energy and enthalpy of formation from the pure oxides at the temperature 298.15 K, which were equal to -130.5 kJ/mol and -131.4 kJ/mol, respectively.

KW - Ceramics

KW - Chemical synthesis

KW - Nuclear reactor materials

KW - Oxide materials

KW - Rare earth alloys and compounds

KW - Thermodynamic properties

KW - LN(2)ZR(2)O(7)

KW - HAFNIA

KW - PYROCHLORES

KW - THERMAL-CONDUCTIVITY

KW - EU

KW - ND

KW - SM

KW - OXIDES

KW - GD

KW - CERAMICS

UR - https://www.sciencedirect.com/science/article/abs/pii/S2352492821001926

UR - http://www.scopus.com/inward/record.url?scp=85101901481&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/ae843620-b81a-3bb9-b5cb-1b418a2a850b/

U2 - 10.1016/j.mtcomm.2021.102200

DO - 10.1016/j.mtcomm.2021.102200

M3 - Article

VL - 27

SP - 1

EP - 8

JO - Materials Today Communications

JF - Materials Today Communications

SN - 2352-4928

M1 - 102200

ER -