Calorimetric investigation of the La2Zr2O7, Nd2Zr2O7, Sm2Zr2O7 and LaYO3 compounds and CALPHAD assessment of the La2O3-Y2O3 system

被引：30

作者：

Fabrichnaya, O. ^{[1
]}

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

Seidel, J. ^{[1
]}

Savinykh, G. ^{[1
]}

Ogorodova, L. P. ^{[2
]}

Kiseleva, I. A. ^{[2
]}

Seifert, H. J. ^{[1
,3
]}

机构：

[1] Tech Univ Bergakad Freiberg, D-09596 Freiberg, Germany

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

[3] Karlsruhe Inst Technol, Karlsruhe, Germany

来源：

THERMOCHIMICA ACTA | 2011年 / 526卷 / 1-2期

关键词：

Differential scanning calorimetry; Drop-solution calorimetry; CALPHAD; Perovskite structure; Pyrochlore structure; TEMPERATURE HEAT-CAPACITY; THERMODYNAMIC FUNCTIONS; THERMAL-CONDUCTIVITY; SOLID-SOLUTIONS; PHASE-RELATIONS; PYROCHLORE; EXPANSION;

D O I：

10.1016/j.tca.2011.08.021

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Temperature dependence of heat capacity of the La2Zr2O7, Nd2Zr2O7, Sm2Zr2O7 and LaYO3 is measured in the temperature range of 298.15-1373 K by differential scanning calorimetry (DSC). The enthalpy of formation from oxides for LaYO3 was measured by high-temperature lead borate solution calorimetry using transposed temperature drop method. Transformations in the LaYO3 were experimentally studied using differential thermal analysis (DTA) up to 2173 K. The obtained results for heat capacity and enthalpy of formation of the LaYO3 and temperatures of transformations were used to re-optimize thermodynamic parameters of the La2O3-Y2O3 system. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：50 / 57

页数：8

共 41 条

[1] Liquidus surface in the HfO2-Y2O3-La2O3 system
Andrievskaya, ER
Kovylyaev, VV
Lopato, LM
Ragulya, AV
Shevchenko, AV
[J]. INORGANIC MATERIALS, 2000, 36 (06) : 612 - 619
[2] NEW AIIIBIIIO3 INTERLANTHANIDE PEROVSKITE COMPOUNDS
BERNDT, U
MAIER, D
KELLER, C
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1975, 13 (1-2) : 131 - 135
[3] The heat capacity and derived thermodynamic functions of La2Zr2O7 and Ce2Zr2O7 from 4 to 1000 K
Bolech, M
Cordfunke, EHP
VanGenderen, ACG
VanderLaan, RR
Janssen, FJJG
VanMiltenburg, JC
[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1997, 58 (03) : 433 - 439
[4] ENERGETICS OF LA2-XSRXCUO4-Y SOLID-SOLUTIONS (0.0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1.0)
BULARZIK, J
NAVROTSKY, A
DICARLO, J
BRINGLEY, J
SCOTT, B
TRAIL, S
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1991, 93 (02) : 418 - 429
[5] Ceramic materials for thermal barrier coatings
Cao, XQ
Vassen, R
Stoever, D
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2004, 24 (01) : 1 - 10
[6] STUDY AT HIGH-TEMPERATURE OF EQUILIBRIUM DIAGRAM OF SYSTEM FORMED BY LANTHANUM SESQUIOXIDE WITH YTTRIUM SESQUIOXIDE
COUTURES, J
FOEX, M
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1974, 11 (04) : 294 - 300
[7] Assessment of thermodynamic functions in the ZrO2-Nd2O3-Al2O3 system
Fabrichnaya, O.
Seifert, H. J.
[J]. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2008, 32 (01): : 142 - 151
[8] Thermodynamic modelling in the ZrO2-La2O3-Y2O3-Al2O3 system
Fabrichnaya, O.
Zinkevich, M.
Aldinger, F.
[J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2007, 98 (09) : 838 - 846
[9] Thermodynamic assessment of the systems La2O3-Al2O3 and La2O3-Y2O3
Fabrichnaya, O.
Zinkevich, M.
Aldinger, F.
[J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2006, 97 (11) : 1495 - 1501
[10] Up-Date of a Thermodynamic Database of the ZrO2-Gd2O3-Y2O3-Al2O3 System for TBC Applications
Fabrichnaya, O.
Seifert, H. J.
[J]. JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION, 2011, 32 (01) : 2 - 16

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