White corundum powder because of its thermochemical stability, so in most cases will be used in the refractory industry, and low-quality although it has a certain high temperature resistance, but due to various reasons, not only will there be pulverization, bursting phenomenon, its melting point will also be reduced a lot. Therefore, for white corundum powder, if it is used as a refractory material, there must be a quality guarantee.
And white corundum powder in addition to their own refractory materials, can also be used as other refractory additives, greatly improve their performance, next to introduce it: for some stereotyped or unshaped refractory materials, the use of white corundum powder to fill their pores, on the one hand, can improve bulk density, reduce porosity, on the other hand, because of the strength of white corundum itself, the light of refractory materials will also be blessed accordingly.
Many times alumina powder will be used to make refractory materials, and if white corundum powder is used instead, its high temperature resistance performance will be improved, the main reason is that after adding white corundum powder, the density of refractory materials will be improved accordingly, and due to high temperature, white corundum will undergo some reactions to generate mullite with better refractory, thereby increasing the high temperature resistance of refractories.
Although the existence of white corundum can indeed help refractory materials improve some properties, it should be noted that the amount of white corundum powder must be controlled, otherwise it may waste the material and have not yet obtained the desired results.