Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
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Reaction mechanism for the ammonolysis of β-gallium oxide to gallium nitride
Woo-Sik JUNG
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2013 Volume 121 Issue 1413 Pages 460-463

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Abstract

The reaction mechanism for the ammonolysis of β-gallium oxide (β-Ga2O3) to gallium nitride (GaN) was elucidated by observing the morphology of microsized β-Ga2O3 single crystals with a distinct shape under a flow of ammonia (NH3) and hydrogen (H2) at elevated temperatures. The morphology of the microsized β-Ga2O3 single crystals grown on the c-plane sapphire by the thermal annealing of gallium sulfide, was not retained after calcination under a flow of NH3 and H2. These microstructural observations strongly support that the ammonolysis of β-Ga2O3 to GaN proceeds through gaseous Ga2O, and that the rate of the reduction of β-Ga2O3 to Ga2O is slower than that of the nitridation of Ga2O to GaN.

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© 2013 The Ceramic Society of Japan
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