Investigation of the Reaction Time and the Process of Synthesis of GaN Nanopowders by Ammoniating Ga2O3
GaN nanopowders were synthesized by ammoniating pure Ga2O3 powders at 1000°C for different soaking time. The results show that the growth of GaN at this temperature is based on vapor-solid mechanism. The ammoniating reaction finished and the rearrangement process started when the soaking time is 0.5 h. When the soaking time is 1.5 h, the process of high-temperature aggradation transformed to thermal decomposition-re-crystallization process. Further increasing of soaking time, the fabricated GaN particles with large size aggregated by directional fixed nanorods are substituted by self-governed particles, which agglomerate as honeycomb. Photolumine- scence measurement (PL) test reveals that as prepared sample with 1.5 h possesses the best luminescent property.
Wei Pan and Jianghong Gong
X. S. Xue et al., "Investigation of the Reaction Time and the Process of Synthesis of GaN Nanopowders by Ammoniating Ga2O3", Advanced Materials Research, Vols. 105-106, pp. 376-379, 2010