Evaporation Materials Al2O3 Granule, Optical Coating Use Al2O3 99.99%

Evaporation Materials Al2O3 Granule, Optical Coating Use Al2O3 99.99%

• MF : Al2O3
• MW: 101.96
• CAS: 1344-28-1

Alumina is an inorganic substance with the chemical formula of Al2O3. It is a kind of high hardness compound with melting point of 2054 ℃ and boiling point of 2980 ℃. It can be ionized at high temperature. It is often used to make refractories.

Industrial alumina is prepared from bauxite (Al2O3 · 3H2O) and diaspore. For alumina with high purity, it is usually prepared by chemical method. There are many heterogeneous crystals of Al2O3, more than 10 known, and there are three main crystal forms, namely α - Al2O3, β - Al2O3 and γ - Al2O3. When the temperature is above 1300 ℃, it is almost completely transformed into α - Al2O3.

Alumina contains elements aluminum and oxygen. If the raw material of bauxite is chemically treated to remove the oxides of silicon, iron and titanium, the product is alumina with high purity, and the content of alumina is generally more than 99%. The ore phase is composed of 40% - 76% γ - Al2O3 and 24% - 60% α - Al2O3. γ - Al 2O 3 can be transformed into α - Al 2O 3 at 950-1200 ℃, and the volume shrinkage is significant.

99.995% high purity alumina series are mainly used in LED, artificial sapphire crystal, advanced ceramics, PDP phosphor and some high performance materials. As the raw material of sapphire crystal, we can provide powder, particle, block or column according to different requirements.

99% high purity alumina series are mainly used in high pressure sodium lamp, new luminescent material, special ceramics, advanced coating, tricolor, catalyst and some high performance materials.

Evaporation humidity: 2000-2200, conversion Bai emissivity; 1.54 (0.55um) 1.62 (0.55um) 1.63 (0.55um) extinction coefficient Du; 2.3 × 10 - 3 (0.515um) 8 × 10 - cubic (1.06um) transparent area: 0.2-8 function: high hardness, anti laser damage, strong Dao, anti humidity, multilayer film, protective film.

Alumina is suitable for a variety of dry and wet treatment processes, and can grind the rough surface of any workpiece finely. It is one of the most economical abrasives. This kind of synthetic abrasive with water chestnut has the hardness second only to diamond. It is especially suitable for iron pollution. For the roughest cutting, it can also be made into pebble shape to process the workpiece with precise size to achieve extremely low roughness. Because of its high density, sharp and water chestnut structure, it is one of the fastest cutting abrasives.

Alumina is used to produce brown corundum by electrofusion of high-quality bauxite, while high-quality aluminate is used to produce powder corundum and white corundum. Their natural crystal structure makes them have high hardness and fast cutting performance. At the same time, they are often used as raw materials for bonded abrasives and coated abrasives.

Alumina can be recycled for many times. The number of cycles is related to the material grade and specific process. Most standard abrasive sand blasting equipment can be used.

Applicable industries: aerospace industry, automobile industry, consumer goods processing, casting / die casting, OEM distributors, semiconductor industry and other different fields.

Applicable process scope: pretreatment before electroplating, painting, glazing and coating of PTFE; deburring and descaling of aluminum and alloy products; mold cleaning; pretreatment of metal sandblasting; dry grinding and wet grinding; precise optical refraction; grinding of minerals, metals, glass and crystals; glass engraving and paint additives.