THE ROLE OF ALUMINUM AND ITS OXIDES IN SOLID PROPELLANTS.
Quarterly status rept. no. 3, 1 Jan-31 Mar 63,
STANFORD RESEARCH INST MENLO PARK CALIF
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A brief review of the literature suggests that the work function of solid aluminum oxide may have values of 3.5 eV or more depending on temperature and impurity levels. Pure Al2O3 single crystals may have a work function in excess of 6.5 eV. The significance of these values is discussed briefly. A previously neglected correction has been made to our theory of electron emission by insulators. The electron density in equilibrium with pure alumina particles consequently may be very much smaller than previously estimated. Progress on radar attenuation studies of particle laden flames has been limited owing to the de structive effects of a detonation in our burner system. New experiments are under way. Photo electric emission has been induced in alpha alumina particles by 1849A mercury line radia tion. The significance of this is discussed. Author