Aluminium Hydroxide Dry
Aluminium hydroxide dry, also known as alumina trihydrate or ATH (alumina trihydrate), is a white amorphous powder with a little red. It is a naturally occurring mineral compound that is widely used in various industrial applications. This material has high heat adsorption and has good thermal stability which can reduce flame propagation in materials. It is produced from bauxite using the Bayer process.
Properties of Aluminium Hydroxide Dry
Aluminium hydroxide dry is a white, crystalline, odourless powder that is soluble in acids but insoluble in water. It has a molecular formula of Al(OH)3 and a molecular weight of 78.0 g/mol. The mineral is produced through the bauxite refining process, where it is extracted from the ore by digestion with sodium hydroxide.
Applications of Aluminium Hydroxide Dry
One of the primary applications of aluminium hydroxide dry is as a flame retardant. It is added to various materials, including plastics, rubber, textiles, and paper, to reduce the risk of fire. When exposed to high temperatures, aluminium hydroxide dry decomposes to release water vapour, which cools the surrounding area and delays the spread of fire.
Filler and Pigment
Aluminium hydroxide dry is also used as a filler and pigment in various products, including paints, coatings, adhesives, and ceramics. It provides improved hardness, gloss, and durability to these products, and helps reduce their costs.
Aluminium hydroxide dry is used in water treatment plants to remove impurities from water. It acts as a coagulant, helping to aggregate impurities in the water and making them easier to remove.
Usage of Aluminium Hydroxide Dry
Aluminium hydroxide dry is typically added to products as a powder or fine particle, depending on the application. In flame retardants, it is often added in concentrations of 20-50% by weight. In filler and pigment applications, it is typically added in concentrations of 5-30% by weight.