How to Source Good Quality White Fused Corundum?
In recent years due to rising prices of goods and products, the increasing price of electricity enforce the production of white corundum pressure which leads to the market competition is so fiercely that the quality of white fused corundum produced by some illegal is getting worse.
As a wear-resistance, abrasive and refractory materials, the quality of white fused corundum supplied in the market is unstable. So it is very important to make a distinguish of good quality and bad quality while sourcing white fused corundum.
White corundum can also be used as a refractory material and the contains impurities will affect its fire resistance. Some impurities of refractory materials are fugitives materials, and some have a high melting point, if the fugitives materials coexist with the main ingredients, it can produce fusible materials. Therefore, the presence of impurities often has high influence in the smelt of the main component which will affect the material to resist high temperature.
White fused corundum is made from the high quality alumina by melting above 2000°C in the electric arc furnace and cooling. It is white with the main crystal phase alphaAl2O3. In the production process, white fused corundum will contain some impurities, the main impurities are SiO2, Fe2O3, TiO2. The fewer impurities, the higher the quality of white fused corundum. The content impurities of white fused corundum is a way to judge the quality of white fused corundum. In addition, the content of Al2o3 in white corundum also directly shows the quality of corundum.