White aluminum oxide is a very practical type of corundum among abrasive products. White fused alumina abrasives are widely used in many industrial fields. Its role in the foundry industry is also irreplaceable.
So how does white aluminum oxide improve the surface quality of castings?
In recent years, the use of zirconium silicate as a shell material in the surface layer of industrialized countries in Europe and America has been greatly reduced, and fused white fused alumina has been used to partially or fully improve the shell performance and further improve the surface quality of castings. From the practice of blade process improvement, it is realized that the performance and effect of zircon materials vary greatly depending on their grade, origin of ore and price.
The effect of white aluminum oxide will affect its effect. How to judge the quality of white fused alumina?
White aluminum oxide contains impurities during the production process. The main impurities are SiO2, Fe2O3, TiO2. The less impurities, the higher the quality of white fused alumina. Judging the content of impurities in white aluminum oxide has become a method to judge the quality of white fused alumina. In addition, the content of Al2O3 in white fused alumina also directly indicates the quality of white corundum.
White aluminum oxide can also be used as a refractory material.
If it contains impurities, it will affect its refractory performance. Some of the impurities in refractory materials are fusible, and some have a very high melting point, but when they coexist with the main component, they can produce fusible substances. Therefore, the presence of impurities often has a strong fluxing effect on the main component. Although the fluxing effect of white aluminum oxidesometimes helps the liquid phase sintering of the material, it has a serious harm to the material's resistance to high temperature.
