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
Hauptverfasser: Moosavi‐Khoonsari, Elmira, Hudon, Pierre, Jung, In‐Ho
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Hudon, Pierre
Jung, In‐Ho
description 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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title 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
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