Study of aluminum hydroxide powder prepared by chemical dispersion of aluminum and its alloy

Aluminum hydroxide is a secondary product during operation of a hydrogen generator. An alkaline reaction proceeding between aluminum or aluminum alloy and caustic soda may be considered as a chemical dispersion method with preparation of nanodispersed aluminum hydroxide powder. Particle fineness and morphology, and also aluminum hydroxide powder phase composition, are different with different preparation methods, and therefore x-ray-phase, petrographic, and dimensional analyses are performed for three powder samples. Two powder samples are studied, prepared by chemical dispersion of aluminum (sample 1) and silumin AK7 (sample 2). Results for industrially produced aluminum hydroxide powder, prepared by the Bayer method (sample 3) are studied for comparison.