Keramické kotouče z vysoce čistého oxidu hlinitého pro průmyslové aplikace

Alumina ceramic disc is an industrial material with many excellent properties, widely used in many fields. The following is a detailed analysis of alumina ceramic discs:

1, the physical and chemical properties of alumina ceramic disk

High purity and density: the alumina content of alumina ceramic discs is usually as high as 95% or even 99% or more, and the density reaches 3.6 g/cm3, showing its high material density.

Hardness and wear resistance: its Rockwell hardness exceeds 80 HRA, compressive strength is up to 850 MPa, bending strength exceeds 290 MPa, and fracture toughness KIC value reaches 4.8 MPa-m square root. These excellent physical properties make alumina ceramic discs have excellent wear resistance.

Insulation: Alumina ceramics is an excellent electrical insulator with a low dielectric constant, suitable for insulation needs in electric power, electronic equipment and other fields.

Corrosion resistance: It has high chemical stability and can withstand corrosive media such as acid and alkali. It is suitable for corrosive working conditions in chemical industry, environmental protection and other fields.

Thermal conductivity: the coefficient of thermal conductivity of 20 watts/meter Kelvin, showing its good thermal conductivity, suitable for heat dissipation and heat transfer components of high temperature equipment.

2. Manufacturing process for alumina ceramic discs

Alumina ceramic disk manufacturing process usually includes the following steps:

Raw material preparation: select high-quality high-purity alumina powder as the main raw material, and add a certain proportion of additives and stabilizers to ensure the purity and stability of the material.

Molding: After mixing and grinding, the mixed raw materials are pressed or injected into ceramic discs of specific shapes and sizes.

Sintering: The molded ceramic discs are placed in a high temperature furnace for sintering. Through chemical reactions and crystal growth at high temperatures, the ceramic material acquires higher density and excellent properties.

Surface treatment: Through grinding, polishing and other processes, the surface of the ceramic disk is smooth and even, improving its aesthetics and processing performance.

3. the application field of alumina ceramic disk

Due to the above excellent performance, alumina ceramic disc is widely used in the following fields:

Industrial field: such as mining, metallurgy, machining and other industries, used for particle classification, crushing and dispersion in the production of abrasive and coating materials.

Electrical and electronic: as insulating partition elements of electrical equipment, insulating gaskets, etc., to ensure the stable operation of electric and electronic equipment.

Chemical and environmental protection: used in chemical reactors, pipeline linings and other equipment components under corrosive conditions to ensure the long-term use of chemical and environmental protection equipment.

Other fields: such as the semiconductor industry, the fixed ring of the photolithography machine and the ceramic heating element of the cosmetology instrument, also need the high precision and stability of alumina ceramic disc.

In summary, alumina ceramic disc is a material with excellent functions and a wide range of applications. Its wear resistance, insulation, corrosion resistance, thermal conductivity and mechanical strength make it play an important role in various industries. With the continuous development of technology, the research and application of alumina ceramic discs will continue to deepen, providing more possibilities and opportunities for various industries.