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Phase equilibria study and thermodynamic description of the BaO‐CaO‐Al 2 O 3 system
Author(s) -
Zhang Rui,
Mao Huahai,
Taskinen Pekka
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14793
Subject(s) - isothermal process , calphad , electron probe microanalysis , thermodynamics , phase (matter) , chemical stability , quenching (fluorescence) , phase diagram , scanning electron microscope , work (physics) , microanalysis , chemistry , materials science , analytical chemistry (journal) , electron microprobe , mineralogy , physics , fluorescence , organic chemistry , quantum mechanics , composite material , chromatography
A combined experimental investigation and thermodynamic assessment was performed for the BaO‐CaO‐Al 2 O 3 system. By using a high‐temperature equilibration/quenching technique and scanning electron microscopy, electron probe microanalysis, and X‐ray powder diffraction analysis, the phase equilibria at 1500°C and phase stability of BaCa 2 Al 8 O 15 phase were determined. An extensive literature survey was conducted for the experimental and thermodynamic modeling data of the BaO‐CaO‐Al 2 O 3 system. According to the literature data and the present measurements, a thermodynamic assessment was made in order to obtain a set of self‐consistent thermodynamic parameters to describe the BaO‐CaO‐Al 2 O 3 system. Based on the thermodynamic parameters acquired in this work, isothermal sections at 1100°C, 1250°C, 1400°C, 1475°C, and 1500°C and the BaO·Al 2 O 3 ‐CaO·Al 2 O 3 and BaO·6Al 2 O 3 ‐CaO·6Al 2 O 3 joints were calculated and compared with the available experimental data.