Causes of black spots in white fused alumina micropowder
First, black spots appear in the white fused alumina micropowder, which may be due to rust. The raw material of white fused alumina micropowder requires iron oxide. If it is not removed during the production process, black spots and particles will appear. At the same time, the appearance of this situation also has a great relationship with the production process. The purity of the white corundum produced by regular manufacturers is all qualified. At the same time, there are screening and pickling processes, and basically no impurities will exceed the standard. In this case, there will be no granular black spots.
Too many impurities in white fused alumina also directly proves that the quality of white corundum is not good. If the quality of white corundum is not good enough, there will be many problems in later use, such as insufficient hardness, or damage to the article due to polishing.