Aluminium oxide is an inorganic substance with the chemical formula A1203, a highly hard compound with a melting point of 2054°C and a boiling point of 2980°C. It is an ionic crystal that can be ionized at high temperatures and is commonly used in the manufacture of refractory materials. Calcined alumina and alumina both contain the same substance, but because of some production methods and other process differences, so that the two in the use of performance and so there will be some differences.
Alumina is the main mineral of aluminium in nature, it will be crushed and impregnated with high temperature sodium hydroxide solution to obtain sodium alumina solution; filter to remove the residue, cool down the filtrate and add aluminium hydroxide crystals, after a long time stirring, the sodium alumina solution will decompose and precipitate aluminium hydroxide; separate the precipitate out and wash it, then calcine it at 950-1200°C to get c-type alumina powder, calcined Alumina is c-type alumina. The melting and boiling points are very high.
Calcined alumina is insoluble in water and acid, also known as aluminium oxide in industry, and is the basic raw material for the production of aluminium metal; it can also be used in the production of various refractory bricks, refractory crucibles, refractory tubes and high temperature resistant laboratory instruments; it can also be used as an abrasive, flame retardant and filler; high purity calcined alumina is also the raw material for the production of artificial corundum, artificial red master stone and blue master stone; it is also used for the production of board substrates for modern large-scale integrated circuits. Calcined alumina and alumina in the production process and other aspects are in a little difference, the applicable industry areas are also different, so in the purchase of products before the first to find out the specific areas of use