Pryolytic preparation of gallium nitride from Ga(NEt_2)_3_2 and its ammonolysis ocmpound

摘要

Gallium nitride (GaN) was prepared by the pyrolytic conversion of both [Ga(NEt_2)_3]_2 and its ammonolysis product at 600 deg C for 4 h under Ar. The pyrolyzed residues were analyzed by X-ray powder diffraction and scanning electron microscopy, and the pyrolysis processes of the precursors under He were investigated by thermogravimetry-mass spectrometry.The XRD pattern of the pyrolyzed residue of [Ga(NEt_2)_3]_2 showed well- resolved peaks due to a mixture of cubic and hexagonal close-packed layers of GaN. The broad XRD pattern of the pyrolyzed residue of the ammonolysis product was also attributed to the mixture of cubic and hexagonal close-packed layers of GaN.For the pyrolysis of [Ga(NEt_2)_3]_2, the evolution of hydrocarbons was extensively observed at relatively high temperature,but a large amount of carbon (11 mass