An investigation of the radiative and evaporative properties of Al2O3 samples has been made. These observed properties interact in a manner such that, upon melting, the rate of evaporation is observed in increase discontinuously. This phenomenon had previously been attributed to a change in the evaporation coefficient. The current investigation has shown that the evaporation coefficient for Al2O3 is constant and that the observed increase in vaporization is due to an increase in the temperature which, in turn, is due to a discontinuous increase in the emissivity. Relative vapor pressure measurements were also made in this study, and the reported existance of the vapor species AlC2 was not confirmed. All other reported vapor species were confirmed.
Mass spectrometric studies of Al2O3 vaporization processes
Massenspektrometrie bei einem Al2O3 Verdampfungsprozess
US Government Reports ; 1-12
1976
12 Seiten
Report
Englisch
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