Accession Number : AD0475781

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

Corporate Author : RAND CORP SANTA MONICA CA

Personal Author(s) : Krieger, F. J.

Report Date : NOV 1965

Pagination or Media Count : 31

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