Cheap 220 Grit Aluminum Oxide Manufacturers Philippines

brown aluminium oxide that meets typical technical conditions is composed of more than 95% of α-alumina crystals, and is composed of a solid solution of Al2O3 containing Ti2O3. Most of the glassy slag is composed of silicon dioxide, titanium dioxide, and other trace oxides present in the electric arc furnace.

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These oxides constitute the glass phase, aluminum oxide abrasive which has a relatively low solubility in the crystal structure of α-alumina grains. The amount of glassy slag and the distribution of impurities with α-alumina grains are the main factors affecting the properties of brown corundum. Α-alumina gives brown corundum material hardness and high melting point, and the presence of glass phase and impurities gives brown corundum toughness or resistance to crushing.

(cheap 220 grit aluminum oxide manufacturers philippines)For silicon carbide abrasive that meets the requirements of typical technical conditions, the mixing ratio of silica and titanium dioxide in the glass phase is theoretically close to 1: 1. If there is too much silica in the glass phase, excess silica cannot be retained. In the glass phase, it reacts with a part of alumina to form mullite (2SiO2 (3Al2O3)), which will reduce the toughness of aluminum oxide grit. The mesh number is a parameter that indicates the size of brown corundum.

On the other hand, if there is excess titanium oxide (TiO2) in brown fused alumina, it cannot remain in the glass phase, but reacts with alumina to form aluminum titanate (TiO2 (Al2O3)). Aluminum titanate is the third phase at the interface between α-alumina grains and glass phase, which will weaken the glass phase between α-alumina grains. The difference in thermal expansion coefficient between the three phases also causes cracks between the synthetic corundum grains during heating.(cheap 220 grit aluminum oxide manufacturers philippines)

Magnetic iron mainly exists in green silicon carbide in the form of ferrosilicon (FeSi) or black iron. Ferrosilicon is a by-product of iron and silica when they are reduced from bauxite. If the bauxite has a low iron content and a high silica content, iron must be added to the furnace charge to ensure that the black aluminum oxide blast media in the ferrosilicon is less than 15%. Since the iron content is 85%, FeSi is magnetic at room temperature And can be separated with a magnetic separator.

(cheap 220 grit aluminum oxide manufacturers philippines)The magnetic size of FeSi depends on temperature, and decreases with increasing temperature. If a brown aluminum oxide crystal block is broken and passed through a magnetic separator, if it is still hot at this time, the magnetic properties of FeSi will be reduced and it cannot be removed. Black iron or metallic iron is iron that is brought in by the wear of crushers and processing equipment and can be easily removed with a magnetic separator. Different industries use different particles of emery abrasive.

The number of black silicon carbide meshes is the number of holes, which is the number of holes per square inch. The larger the mesh size, the smaller the pore size. In general, the number of mesh x the pore diameter (micron) = 15,000. For example, the pore size of a 400 mesh screen is about 38 microns; the pore size of a 500 mesh screen is about 30 microns. The size of the sieve mesh determines the maximumblack aluminum oxide 70 grit abrasive media particle size of the sieved powder.(cheap 220 grit aluminum oxide manufacturers philippines)