Heat capacity for the Eu2Zr2O7 and phase relations in the ZrO2-Eu2O3 system: Experimental studies and calculations

被引：29

作者：

Fabrichnaya, O. ^{[1
]}

Kriegel, M. J. ^{[1
]}

Pavlyuchkov, D. ^{[1
]}

Seidel, J. ^{[1
]}

Dzuban, A. ^{[2
]}

Savinykh, G. ^{[1
]}

Schreiber, G. ^{[1
]}

机构：

[1] Tech Univ Freiberg, Freiberg, Germany

[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow, Russia

来源：

THERMOCHIMICA ACTA | 2013年 / 558卷

关键词：

Differential scanning calorimetry; Transposed drop calorimetry; Differential thermal analysis; ZrO2; Eu2O3; CALPHAD; Y2O3; THERMODYNAMICS; TRANSFORMATION; CALORIMETRY; REFINEMENT;

D O I：

10.1016/j.tca.2013.02.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Temperature dependence of heat capacity of the Eu2Zr2O7 and Y2O3 is measured in the temperature range of 298.15-1373 K by differential scanning calorimetry (DSC). Phase transformation in the Eu2Zr2O7 was experimentally studied using differential thermal analysis (DTA) up to 2173 K and temperature of pyrochlore to fluorite transition was established to be 2128 K. Eutectic reaction was determined by DTA to be 2326 K. Peritectoid reaction F + B = C was established to occur at similar to 1823 K based phase equilibrium studies. Phase compositions were determined by SEM/EDX. The obtained results for heat capacity of the Eu2Zr2O7, temperatures of transformations and phase compositions were used to optimise thermodynamic parameters of the Eu2O3-ZrO2 system. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：74 / 82

页数：9

共 30 条

[1] THERMO-CALC & DICTRA, computational tools for materials science [J].

Andersson, JO ;

Helander, T ;

Höglund, LH ;

Shi, PF ;

Sundman, B .

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2002, 26 (02) :273-312

[2]

[Anonymous], BULLETIN

[3] Phase transitions and thermodynamic properties of yttria, Y2O3: Inelastic neutron scattering shell model and first-principles calculations [J].

Bose, Preyoshi P. ;

Gupta, M. K. ;

Mittal, R. ;

Rols, S. ;

Achary, S. N. ;

Tyagi, A. K. ;

Chaplot, S. L. .

PHYSICAL REVIEW B, 2011, 84 (09)

[4] SGTE DATA FOR PURE ELEMENTS [J].

DINSDALE, AT .

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 1991, 15 (04) :317-425

[5] Calorimetric investigation of the La2Zr2O7, Nd2Zr2O7, Sm2Zr2O7 and LaYO3 compounds and CALPHAD assessment of the La2O3-Y2O3 system [J].

Fabrichnaya, O. ;

Kriegel, M. J. ;

Seidel, J. ;

Savinykh, G. ;

Ogorodova, L. P. ;

Kiseleva, I. A. ;

Seifert, H. J. .

THERMOCHIMICA ACTA, 2011, 526 (1-2) :50-57

[6]

Fabrichnaya O., 2012, INT J MAT RES

[7] ORDER AND DISORDER IN SOME PYROCHLORE-TYPE COMPOUNDS [J].

FAUCHER, M ;

CARO, P .

JOURNAL OF SOLID STATE CHEMISTRY, 1975, 12 (1-2) :1-11

[8] REFINEMENT OF THE Y2O3 STRUCTURE AT 77 K [J].

FAUCHER, M ;

PANNETIER, J .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1980, 36 (DEC) :3209-3211

[9]

GAVRICHEV KS, 1993, ZH FIZ KHIM+, V67, P1731

[10] REAL STRUCTURE OF UNDOPED Y2O3 SINGLE-CRYSTALS [J].

HANIC, F ;

HARTMANOVA, M ;

KNAB, GG ;

URUSOVSKAYA, AA ;

BAGDASAROV, KS .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1984, 40 (APR) :76-82

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