Cheap Brown Aluminum Oxide Factory Taiwan

Nanometer is a unit length, brown aluminium oxide 24 mesh which is abbreviated to nm. 1nm=103um=106mm=10-9m。 Nano powder refers to single crystal or polycrystal with grain size less than 100nm. As the number of surface atoms, surface energy and surface activity are greatly increased, the adsorption and catalytic capacity are greatly improved, the vapor pressure is increased, and the silicon carbide grit melting point is decreased. 

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The size of 1 ~ 100nm is divided into nano system. Therefore, the preparation of a-Al2O3 black corundum powder technology has attracted attention. Conventional Al2O3 sintering temperature is above 1700 ~ 1800 ℃, so that nano materials have many properties different from those of general coarse-grained materials, while nano Al2O3 can be sintered to 99.0% relative density at 1150 ~ 1400 ℃. Nanotechnology has improved the level of existing industries and aluminum oxide 30 or 40 grit products. 

Nanotechnology is a new interdisciplinary subject, pink corundum which was developed gradually in the late 1980s and early 1990s. It has great potential to create new production processes, new materials and new products. The combination of nanotechnology and traditional technology constitutes a new situation of nanotechnology development. It is internationally recognized that the size of 0.1 ~ 100nm is nanometer space. A-Al2O3 is introduced into white aluminium oxide super fine refractory products.

Nano material technology (including brown fused alumina material technology and nano composite modification technology) is due to the change of the properties of nano particles, that is, the grains are small, so that the atoms on the grain boundary are more than those inside the grains, resulting in high concentration of grain boundaries, such as increasing strength and hardness, low density brown aluminum oxide 16 grit, low modulus of elasticity, high resistance Low thermal conductivity, etc.

Because of these excellent properties, it is the top of science development in the 20th century. It is widely used in various brown aluminum oxide fields. Refractories are no exception. Nanotechnology and nanomaterials have attracted extensive attention of refractories workers at home and abroad. Whether it is shaped or amorphous refractories, the introduction of nanomaterials not only reduces the sintering temperature, but also significantly improves the quality index of brown aluminum oxide sandblasting refractories.

The commonly accepted definition of brown aluminium oxide powder is powder with average particle size less than 100nm. So it overlaps with the concept of ultrafine powder. There are a lot of nano powder in the ultrafine powder. Nano powder can reduce the sintering temperature, save energy and improve its performance, but it is still in the experimental stage. With the progress of science and technology, the application of a-Al2O3 nano materials in low sodium white fused alumina refractories will be further expanded.

In this paper, the technology of preparing a-Al2O3 nano powder is introduced. Taking Al (OH) 3 as raw material, the industrial white alumina was washed several times with hot water and distilled water, then filtered and dried. A certain amount of phase change additive (ZnF2, AlF3) and nano a-Al2O3 powder were added. Then a-Al2O3 nanoparticles were agglomerated and white aluminum oxide grit polyethylene glycol with a mass fraction of 5% was used as the dispersant.