Coupled Experimental and Thermodynamic Optimization of the Na 2 O–FeO–Fe 2 O 3 –Al 2 O 3 System: Part 1. Phase Diagram Experiments
As part of the complete thermodynamic modeling of the Na 2 O–FeO–Fe 2 O 3 –Al 2 O 3 system, the Na 2 O–FeO–Fe 2 O 3 –Al 2 O 3 phase diagrams in air (1583 and 1698 K) and at Fe saturation (1573 and 1673 K) were investigated using the quenching method followed by Electron Probe Micro‐Analyzer ( EPMA )...
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| Veröffentlicht in: | Journal of the American Ceramic Society 2016-02, Vol.99 (2), p.705-714 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | As part of the complete thermodynamic modeling of the Na
2
O–FeO–Fe
2
O
3
–Al
2
O
3
system, the Na
2
O–FeO–Fe
2
O
3
–Al
2
O
3
phase diagrams in air (1583 and 1698 K) and at Fe saturation (1573 and 1673 K) were investigated using the quenching method followed by Electron Probe Micro‐Analyzer (
EPMA
) and X‐ray Diffraction (
XRD
) phase analysis. General features of the phase diagrams in this system were well revealed for the first time. A complete meta‐oxide solid solution between NaAlO
2
and NaFeO
2
was observed. An extensive solid solution of Na
2
(Al,Fe)
12
O
19
Na‐βˮ‐alumina was found and the existence of a miscibility gap in this solution was confirmed. Several compatibility triangles of three‐phase assemblages were also identified in air and at Fe saturation. |
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| ISSN: | 0002-7820 1551-2916 |
| DOI: | 10.1111/jace.14020 |