Metastable eutectic gas to solid condensation in the Al2O3–SiO2 system
- 1 March 1999
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 110 (9) , 4554-4558
- https://doi.org/10.1063/1.478336
Abstract
An analytical and transmission electron microscope study showed that nonequilibrium gas-to-solid condensation in an AlO–SiO vapor yielded solid units with well defined compositional peaks at 11.5 wt % Al2O3 and 41–47 wt % Al2O3. These peaks coincide with metastable eutectic points in the Al2O3–SiO2 phase diagram. The compositions of thermally annealed units support the presence of a (metastable) miscibility gap between ∼15–∼60 wt % Al2O3. The important finding in this analysis is the determinative role of metastable eutectics in nonequilibrium gas-to-solid condensation.Keywords
This publication has 12 references indexed in Scilit:
- Mid-Infrared Spectral Evolution of Amorphous Magnesium Silicate Smokes Annealed in Vacuum: Comparison to Cometary SpectraIcarus, 1998
- Alumina‐Silica Phase Diagram in the Mollite RegionJournal of the American Ceramic Society, 1987
- Analytical electron microscopy of MgSiO smokes: A comparison with infrared and XRD studiesIcarus, 1986
- Some etching studies of the microstructure and composition of large aluminosilicate particles in fly ash from coal-burning power plantsEnvironmental Science & Technology, 1980
- Direct synthesis and structure of epitaxial cadmium sulphide layers on cadmium single crystalsJournal of Materials Science, 1978
- Stable and Metastable Equilibria in the System SiO2‐Al2O3Journal of the American Ceramic Society, 1975
- Preparation of fine particles of astrophysical interest by gas evaporation techniquesIcarus, 1975
- The quantitative analysis of thin specimensJournal of Microscopy, 1975
- Immiscibility and Crystallization in A12O3-SiO2GlassesJournal of the American Ceramic Society, 1969
- Revised Phase Diagram for the System Al2O3—SiO2Journal of the American Ceramic Society, 1962