Influence of Phase Transition of Starting Materials on Growth of GaN Nanomaterials by CVD

Ground by mechanical ball milling under certain conditions, β-Ga₂O₃ powders can transit to ε-Ga₂O₃ ones. As starting materials, Ga₂O₃ powders treated by
different methods are used to prepare GaN nanomaterials. It is found that the morphologies of GaN nanomaterials are quite different due to the phase transition of Ga₂O₃ from β-Ga₂O₃ to ε-Ga₂O₃.