Activation Energy for the Sublimation of Gallium Nitride
作者： Zuhair A. Munir , Alan W. Searcy
DOI: 10.1063/1.1695924
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摘要: Gallium nitride was found to sublime congruently from a torsion—effusion cell when the ratio of orifice area sample about 1/30 and incongruently yield nitrogen gas liquid gallium this 1/100 or less. A mass‐spectrometer investigation revealed no measurable concentrations vapor molecules. The heat activation for reaction 2GaN(s)=2Ga(1)+N2(g) calculated be 39 kcal at 1300°K temperature dependence effusion data.The rate 2GaN(s)=2Ga(g)+N2(g) measured by torsion—Langmuir method. From sublimation ΔH1300‡=218.6 compared 173 equilibrium reaction, entropy 74.3 cal/deg.
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