A synthesis of purified aluminum fluoride powder by atmospheric microwave-plasma torch

Synthesis of aluminum fluoride (AlF(3)) powder by direct evaporation of aluminum (At) granules in an atmospheric microwave-plasma torch demonstrates a possibility of a direct continuous preparation. The solid-phase At granules are injected axially by Ar gas. H(2), CF(4), and N(2) as a swirl gas are used for fluorination of At granule and plasma stabilization. The as-produced samples were characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR). The average crystal size obtained front the Williamson-Hall plot was approximately 37 nm. The surface area and pore distribution properties of the particles were also analyzed by making use of the nitrogen absorption method.