Phase equilibria investigations and thermodynamic modeling of the system Bi2O3-Al2O3

F. Oudich; N. David; S. Mathieu; M. Vilasi

doi:10.1016/j.jnucmat.2014.10.051

Phase equilibria investigations and thermodynamic modeling of the system Bi₂O₃-Al₂O₃

F. Oudich, N. David, S. Mathieu, M. Vilasi

Nancy Université

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

Abstract

The system Bi₂O₃-Al₂O₃ has been experimentally investigated above 600 °C by DTA, XRD and EPMA under air and low oxygen pressure. Only two compounds were found to exist in equilibrium, which are Bi₂Al₄O₉(1Bi₂O₃:2Al₂O₃) and Bi₂₅AlO₃₉(25:1). The latter exhibits a sillenite structure and does not contain pentavalent bismuth. A peritectoid decomposition of (25:1) and a peritectic melting of (1:2) occur at 775 °C and 1075 °C respectively, while an eutectic transformation was observed at 815 °C for 97 mol% Bi₂O₃. On the basis of the results obtained within the present work as well as experimental data provided from literature, a thermodynamic modeling where the liquid phase is described by the two-sublattice ionic liquid model was performed according to the Calphad approach. The resulting thermodynamic optimization yielded good agreement with experimental results in the investigated region.

Original language	English
Pages (from-to)	72-79
Number of pages	8
Journal	Journal of Nuclear Materials
Volume	457
DOIs	https://doi.org/10.1016/j.jnucmat.2014.10.051
Publication status	Published - 1 Jan 2015
Externally published	Yes

Access to Document

10.1016/j.jnucmat.2014.10.051

Cite this

@article{bc367f0a582e46a7951dadd25ded4bb5,

title = "Phase equilibria investigations and thermodynamic modeling of the system Bi2O3-Al2O3",

abstract = "The system Bi2O3-Al2O3 has been experimentally investigated above 600 °C by DTA, XRD and EPMA under air and low oxygen pressure. Only two compounds were found to exist in equilibrium, which are Bi2Al4O9(1Bi2O3:2Al2O3) and Bi25AlO39(25:1). The latter exhibits a sillenite structure and does not contain pentavalent bismuth. A peritectoid decomposition of (25:1) and a peritectic melting of (1:2) occur at 775 °C and 1075 °C respectively, while an eutectic transformation was observed at 815 °C for 97 mol\% Bi2O3. On the basis of the results obtained within the present work as well as experimental data provided from literature, a thermodynamic modeling where the liquid phase is described by the two-sublattice ionic liquid model was performed according to the Calphad approach. The resulting thermodynamic optimization yielded good agreement with experimental results in the investigated region.",

author = "F. Oudich and N. David and S. Mathieu and M. Vilasi",

year = "2015",

month = jan,

day = "1",

doi = "10.1016/j.jnucmat.2014.10.051",

language = "English",

volume = "457",

pages = "72--79",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

}

TY - JOUR

T1 - Phase equilibria investigations and thermodynamic modeling of the system Bi2O3-Al2O3

AU - Oudich, F.

AU - David, N.

AU - Mathieu, S.

AU - Vilasi, M.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - The system Bi2O3-Al2O3 has been experimentally investigated above 600 °C by DTA, XRD and EPMA under air and low oxygen pressure. Only two compounds were found to exist in equilibrium, which are Bi2Al4O9(1Bi2O3:2Al2O3) and Bi25AlO39(25:1). The latter exhibits a sillenite structure and does not contain pentavalent bismuth. A peritectoid decomposition of (25:1) and a peritectic melting of (1:2) occur at 775 °C and 1075 °C respectively, while an eutectic transformation was observed at 815 °C for 97 mol% Bi2O3. On the basis of the results obtained within the present work as well as experimental data provided from literature, a thermodynamic modeling where the liquid phase is described by the two-sublattice ionic liquid model was performed according to the Calphad approach. The resulting thermodynamic optimization yielded good agreement with experimental results in the investigated region.

AB - The system Bi2O3-Al2O3 has been experimentally investigated above 600 °C by DTA, XRD and EPMA under air and low oxygen pressure. Only two compounds were found to exist in equilibrium, which are Bi2Al4O9(1Bi2O3:2Al2O3) and Bi25AlO39(25:1). The latter exhibits a sillenite structure and does not contain pentavalent bismuth. A peritectoid decomposition of (25:1) and a peritectic melting of (1:2) occur at 775 °C and 1075 °C respectively, while an eutectic transformation was observed at 815 °C for 97 mol% Bi2O3. On the basis of the results obtained within the present work as well as experimental data provided from literature, a thermodynamic modeling where the liquid phase is described by the two-sublattice ionic liquid model was performed according to the Calphad approach. The resulting thermodynamic optimization yielded good agreement with experimental results in the investigated region.

U2 - 10.1016/j.jnucmat.2014.10.051

DO - 10.1016/j.jnucmat.2014.10.051

M3 - Article

AN - SCOPUS:84910624554

SN - 0022-3115

VL - 457

SP - 72

EP - 79

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Phase equilibria investigations and thermodynamic modeling of the system Bi2O3-Al2O3

Abstract

Access to Document

Fingerprint

Cite this

Phase equilibria investigations and thermodynamic modeling of the system Bi₂O₃-Al₂O₃