Alumina ceramic grinding balls are made from materials such as bauxite, roller powder, industrial alumina powder, high-temperature calcined Alpha alumina powder, etc., through batching, grinding, powdering, molding, drying, firing and other processes. , Mainly as a grinding medium
Quality and widely used ball stone. Alumina ceramic grinding balls have suitable hardness, density, wear resistance, corrosion resistance, and low price. Therefore, alumina ceramic balls are widely used in white cement, minerals, ceramics, electronic materials, magnetic materials, coatings, paints, etc
It is a good grinding medium for the grinding and processing of raw materials in the industry.
The wear mechanism of alumina grinding balls is divided into brittle fracture wear and plastic deformation wear. The wear characteristic of the former is the shedding of grains along the crystal fracture, and the wear characteristic of the latter is the microcutting of transcrystalline fracture. The wear rate of the former is much greater than that of the latter. People want ceramic
The wear is plastic deformation wear. The internal factors of ceramics have an important influence on the plastic deformation and wear mechanism of ceramics. Alumina ceramic balls are a kind of friction and wear components, and their wear rate is affected by internal and external factors, of which internal factors have a greater impact.
The wear resistance of alumina ceramics is closely related to the mechanical properties of its own materials and the synergy of the microstructure, that is, its internal factors, elastic modulus, hardness, fracture toughness, grain size, grain boundaries and porosity. People have done a lot of
According to the research, the toughness and grain size of ceramics are internal factors that are relatively closely related to wear resistance. The toughness has a greater impact on the friction and wear of ceramics. The smaller the crystal grains, the better the wear resistance of ceramics. So wear-resistant ceramics are moving towards microcrystallization
Towards development. However, the cost of nano alumina ceramics is very high, and it is difficult to popularize and use in the field of engineering applications. Therefore, the research of alumina ceramic wear-resistant materials has made breakthroughs and developments in the grain size range of several microns.
