Features of Structural Phase Transitions of Aluminum Hydroxides under Laser Processing

Resumo

The results of the studies of laser processing of alkoxide aluminum hydroxides with micrometer and nanometer particle sizes are presented. It is shown that the pseudo-boehmite processing process and phase composition of formed oxides are controlled by particle packing, laser radiation propagation in powder, and specific energy deposition. The main phases formed upon laser heating are γ, α-Al₂O₃; the content of δ, θ-Al₂O₃ is low. The minimum corundum crystallite size is ∼50 nm.