Do you know the reason for black spots in white aluminium oxide?
Black spots appear on white aluminium oxide, which may be because the impurities carried by itself have not been removed completely, or it may be impurities that have been mixed intentionally. Rust is a relatively common impurity, because there is iron oxide in the white aluminium oxide raw material itself, if it is not removed, there will be black spots. In addition, during the production process, due to mechanical rust, rust will be accidentally added, which will eventually lead to impure color ofwhite aluminium oxide.
From a production point of view, if the smelting time is insufficient or the smelting process is immature, the white aluminium oxide will have low purity and high impurity content, and small black spots will be seen on the color.
Generally speaking, whether the color of white aluminium oxide is pure or not is one of the criteria for testing the quality of white aluminium oxide. If the quality of white aluminium oxide fails to meet the standard, it will have a great impact on its performance, most obviously reflected in the hardness and grinding force. Therefore, manufacturers must strictly require and pay more attention to production.
