Alumina Ceramic Ring

Alumina Ceramic Ring Properties:

The sintering temperature of alumina ceramic ring can be as high as 1650-1990 ℃. It can be made into molten glass instead of platinum crucible, and can be used to make lamp tubes by light transmittance and alkali metal corrosion resistance.

Alumina ceramic ring has excellent mechanical strength, high temperature resistance, wear resistance, corrosion resistance, good insulation performance and durability. It has the advantages of long life, energy saving, environmental protection, safety, controllability and so on.

Because of its excellent electrical function at high frequency, alumina ceramic ring has low dielectric loss, high volume resistivity, high strength, high hardness, small linear expansion coefficient, and good wear resistance and heat resistance. Alumina is used in 95% of the general economic occasions. Only 99% ～ 99.9% alumina ceramics are selected for special functional requirements.

Application of  Alumina Ceramic Ring :

Alumina Ceramic Ring are used in machinery manufacturing, aerospace, precision instruments, petrochemical, new light sources, textile machinery, electrical appliances, refrigeration equipment, electric heating instruments, instruments, chemical industry, communication, communication and other industries.

The disadvantages of alumina ceramic ring:

Generally, the elastic modulus is quite large, the hardness is high, the brittleness is large, and the crack sensitivity is strong. Therefore, the machining difficulty is mainly manifested in the machining hardness and processing brittleness. In general, the microstructure of alumina ceramics is equiaxed grains, which is composed of ionic bond or covalent bond. Therefore, the fracture toughness of alumina ceramics is low. The stress will make the ceramic surface produce fine cracks, and the cracks will rapidly expand and brittle fracture. Therefore, in the process of machining alumina ceramic ring, the phenomenon of chipping often occurs, that is, small cracks appear on the ceramic surface.