Accession Number:

AD0653925

Title:

THE THERMODYNAMICS OF THE MAGNESIUM SILICATE/MAGNESIUM-SILICON-OXYGEN VAPOR SYSTEM,

Descriptive Note:

Corporate Author:

RAND CORP SANTA MONICA CALIF

Personal Author(s):

• Krieger,F. J.

Report Date:

1967-04-01

Pagination or Media Count:

51.0

Abstract:

The thermodynamic properties of magnesium silicate were investigated over a range of temperatures up to 6000K and pressures up to 1000 atmospheres. Three sets of equilibrium composition equations were used--one representing a pure gas phase, the second a heterogeneous system of gas and condensed magnesia, and the third a heterogeneous system of gas and condensed magnesia and silica. Tabulated summaries give computed values of volume, molecular weight, moles of gas, moles of solid or liquid magnesia and silica, density, enthalpy, energy, and entropy for magnesium silicate at various temperatures and pressures. A conventional Mollier diagram is included in which specific enthalpy is plotted against specific entropy, with cross plots of temperature, pressure, and molecular weight or moles of condensed magnesia and silica. The variation of sublimation temperature with pressure is also shown for magnesia and silica both alone and in the presence of each other. Author

Descriptors:

• (*ABLATION
• THERMODYNAMICS)
• (*MAGNESIUM COMPOUNDS
• THERMODYNAMICS)
• (*SILICATES
• THERMODYNAMICS)
• MAGNESIUM
• SILICON
• OXYGEN
• VAPORS
• THERMAL PROPERTIES
• CHEMICAL EQUILIBRIUM
• VOLUME
• MOLECULAR WEIGHT
• DENSITY
• ENTHALPY
• ENERGY
• ENTROPY
• FLUID MECHANICS
• TABLES(DATA)
• DIAGRAMS
• MAGNESIUM OXIDES
• SILICON DIOXIDE

Subject Categories:

• Ceramics, Refractories and Glass
• Atomic and Molecular Physics and Spectroscopy
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE