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

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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

Author(s):
Krieger, F. J.
Author Organization(s):
RAND CORP SANTA MONICA CALIF
Pagination:
0051

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RM-5337-PR
Contract/Grant Number(s):
F44620-67-C-0045
 Subject Terms
Modernization Areas:
Microelectronics
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
(*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
Field(s)/Group(s):
Ceramics, Refractories and Glass, Atomic and Molecular Physics and Spectroscopy, Thermodynamics
Keyword(s):
ABLATIVE MATERIALS, MAGNESIUM SILICATE
Report Date:
1967 Apr 01