Densities of SiO2-Al2O3 Melts
ILHAN A. AKSAY
Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, College of Engineering, University of California, Berkeley, California 94720
Member, the American Ceramic Society.
Search for more papers by this authorJOSEPH A. PASK
Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, College of Engineering, University of California, Berkeley, California 94720
Now with the Department of Metallurgical Engineering. Middle East Technical University, Ankara, Turkey.
Search for more papers by this authorROBERT F. DAVIS
Department of Materials Engineering and The Engineering Research Services Division, North Carolina State University, Raleigh, North Carolina 27607
Member, the American Ceramic Society.
A portion of this work was conducted while the author was a Graduate Research Assistant at the University of California.
Search for more papers by this authorILHAN A. AKSAY
Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, College of Engineering, University of California, Berkeley, California 94720
Member, the American Ceramic Society.
Search for more papers by this authorJOSEPH A. PASK
Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, College of Engineering, University of California, Berkeley, California 94720
Now with the Department of Metallurgical Engineering. Middle East Technical University, Ankara, Turkey.
Search for more papers by this authorROBERT F. DAVIS
Department of Materials Engineering and The Engineering Research Services Division, North Carolina State University, Raleigh, North Carolina 27607
Member, the American Ceramic Society.
A portion of this work was conducted while the author was a Graduate Research Assistant at the University of California.
Search for more papers by this authorA portion of this work was conducted while the author was a Graduate Research Assistant at the University of California.
Presented at the 25th Pacific Coast Regional Meeting, The American Ceramic Society, Portland, Oregon, October 24, 1972 (Basic Science Division, No. 2-B-72P).
Supported by the Energy Research and Development Administration under Contract NO. W-7405-eng-48.
Abstract
The densities of binary aluminosilicate melts were measured X-radiographically as a function of Al2O3, concentration between 1800° and 2000°C. Within this temperature range, the density curves vary linearly and are parallel from fused SiO2 to ≊30 to 45 mol% Al2O3, depending on the temperature. At higher Al2O3 contents, negative deviation from linearity increases with increasing temperature. Recent supplementary research efforts on various aspects of the system SiO2-Al2O3 indicate that the changing coordination and structural role of the aluminum ion may be a primary factor in determining the shapes of the density curves.
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