Accession Number:

AD0475781

Title:

THE THERMODYNAMICS OF THE SILICA/SILICON-OXYGEN VAPOR SYSTEM,

Descriptive Note:

Corporate Author:

RAND CORP SANTA MONICA CA

Personal Author(s):

• Krieger, F. J.

Report Date:

1965-11-01

Pagination or Media Count:

31.0

Abstract:

The purpose of this study is the thermodynamic investigation of silica, SiO2, over a range of temperatures up to 6000 K and pressures up to 10,000 atmospheres. Two sets of equilibrium composition equations are used--one representing a pure gas phase, the other a heterogeneous system of gas and condensed i.e., solid or liquid silica. The gas phase of the heterogeneous chemical system, like the homogeneous gas phase, comprises 7 gaseous silicon-oxygen species. The results of the computational program are presented in both tabular and graphic form. The later is a conventional Mollier diagram in which specific enthalpy is plotted against specific entropy, with cross plots of temperature, pressure, and molecular weight or moles of condensed silica. Author

Descriptors:

• *SILICON COMPOUNDS
• *OXYGEN
• THERMODYNAMICS
• VAPORS
• OXIDES
• SOLIDS
• GASES
• CHEMICAL EQUILIBRIUM
• ABLATION
• HIGH TEMPERATURE
• PARTICLES
• PHASE STUDIES
• ENTHALPY
• ENTROPY
• CONDENSATION
• DIATOMIC MOLECULES
• PRESSURE
• HIGH PRESSURE
• EQUATIONS
• TABLES(DATA)

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE