alumina trihydrate powder Raw Materials CAS 1344-28-1

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Uses and synthesis of alumina trihydrate powder

alumina trihydrate powder is commonly known as alumina, chemical formula Al2O3, a refractory and insoluble in water white powder. alumina trihydrate 1344-28-1 melting point of 2015 ℃, boiling point of 2980 ℃, the relative density of 4.0, Mohs' hardness of 8.8.

With different crystal types, mainly α and γ two variants. Aluminium hydroxide heating dehydration can be obtained alumina trihydrate Raw Materials

Applications / Functions of alumina trihydrate powder

alumina trihydrate 1344-28-1 Used for polishing abrasives, artificial teeth, artificial bones, magnetic tapes, picture tubes, ruby and sapphire, high-density ceramic substrates for electrical use, etc.

1. alumina trihydrate powder is used in the manufacture of artificial gemstones, the main accessories of YAG laser crystals and integrated circuit substrates. It is used as analytical reagent and advanced ceramic raw material for high pressure sodium lamp arc tube.
2. It is used in industrial high temperature furnaces such as forging heating furnace and even heat furnace. alumina trihydrate Raw Materials can be used as sealing materials and filling materials. Can also be used as reinforcement with reinforcing fibres, furnace lining electronic components (IC board, ferrite) of the calcining furnace.
3. alumina trihydrate powder is used as catalyst and catalyst carrier, which is the main catalyst and carrier in petroleum refining and petrochemical industry. It is also used as dehumidifying agent for air and other gases, and deacidifying agent for transformer oil and turbine oil.

alumina trihydrate 1344-28-1 is used as raw material for rare earth trichromatic phosphor, long afterglow phosphor, submicron/nano grinding material, etc. It is used in functional ceramics, electronic ceramics, laser material, adsorbent, chromatography, etc.

Physicochemical Property of alumina trihydrate powder

White or slightly reddish rods. alumina trihydrate Raw Materials Insoluble in water, slightly soluble in alkali and acid.

Production methodprocess of alumina trihydrate powder

• High-temperature quick-dehydration method: Aluminium hydroxide (hydrated alumina) is produced after high-temperature quick-dehydration, shaping, hydrothermal treatment and drying. Carbonated Aluminium Rubber Method: Aluminium hydroxide and sodium hydroxide are mixed, and then neutralised, carbon dioxide carbonated, washed, pressed and filtered, dried, crushed, pinched, extruded, dried and calcined to produce alumina trihydrate raw materials.
• Spray drying method: aluminium hydroxide is reacted with industrial sulphuric acid, then neutralised with alkali, washed, spray dried and calcined to produce alumina trihydrate powder.

Oil column forming method: Aluminium ingot is dissolved with industrial hydrochloric acid, and then finished products are made through the process of oil column forming into balls, washing, drying and calcination. Various conditions in the preparation process, especially the precipitation conditions have a great influence on the crystalline form, surface area and pore structure of the product, etc.

Generally speaking, it is easy to get amorphous aluminium hydroxide and proposed thin alumina at low temperature and low pH value, and it is easy to produce alumina trihydrate at high pH value. Thin alumina is calcined at 430-500°C to obtain γ-Al2O3, and β-trihydrate alumina is calcined at 300°C to obtain η-Al2O3.

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