China Factory White Aluminum Oxide Powder Polishing Powder

Aluminum is a silver-gray metal with a relative density of 2.55 and a purity of 99.5%. The melting point of aluminum is 685 degrees, the boiling point is 2065 degrees, and the melting heat absorption is 323kJ/g. Aluminum is reductive, easy to oxidize, and exothermic in the oxidation process. During rapid oxidation, the heat release per gram is 15.5kJg. Aluminum is a ductile metal and easy to process. The oxide film on the surface of aluminum is transparent and has good chemical stability.

The aluminum powder particles used for pigments are scaly, and it is precisely because of this scaly particle state that aluminum powder has metal color and shielding function. The industrial production of metal aluminum powder has existed for a long time. The early production method is the ramming method. The aluminum chips are placed in the groove of the ramming machine. The ramming pestle is driven by the machine to continuously punch the aluminum chips in the groove. The ductile aluminum gradually becomes thin and broken under impact. After the aluminum becomes very thin and fine, it is screened and the qualified aluminum powder is taken out as the product.