Why can alumina be used for polishing?

Time:

2023-05-31

Alumina is an inorganic substance with the chemical formula Al2O3. It is a compound with high hardness. It has a melting point of 2054 ° C and a boiling point of 2980 ° C. It has many homogeneous and heterocrystals. There are more than 10 known ones, mainly 3 crystal forms, namely α-Al2O3, β-Al2O3, γ-Al2O3. Among them, the structure and properties are also different, and it is almost completely converted into α-Al2O3 at high temperatures above 1300 ° C.

Special alumina has the advantages of high purity, high hardness, good dimensional stability, high thermal conductivity and resistivity (with good insulation properties), etc. It can be widely used in various new energy battery separator coatings, precision polishing of electronic products, high performance ceramics, etc.,

Application of Special Alumina in Fine Polishing

According to market demand and the excellent characteristics of special alumina, the company has specially developed special alumina powder products with unique production technology. This type of product has the following advantages

⇒ The advantages of narrow particle size distribution range, high hardness, stable crystal phase, strong grinding force, low viscosity, good fluidity, good material placement stability, and not easy to precipitate

⇒ The shape of the crystal is spherical, the shape is smooth and angular, and it is not easy to produce scratches.

Basic requirements for special alumina polishing powder

⇒ The particle size of the micropowder is uniform and within the allowable range;

⇒ It has high purity and does not contain mechanical impurities;

⇒ It has good dispersibility to ensure the uniformity of the processing process, and an appropriate amount of dispersant can be added to improve the suspension rate;

⇒ The powder particles have a certain lattice shape, and sharp edges and corners are formed when broken to improve polishing efficiency;

⇒ It has suitable hardness and density, and has good wettability and suspension with water, because the polishing powder needs to be mixed with water.

Special alumina polishing powder can generally be used for marble stone polishing, metal aluminum polishing, metal stainless steel polishing, metallographic (acrylic plate) polishing, PCB printed circuit board polishing, paint polishing, resin polishing, jade polishing, etc.

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