Material of CERAMIc ROLLER bearing:
Usuaully the ceramic roller bearing materials are alumina ceramic and zirconia ceramic.
Alumina Ceramic roller beairng：
1.They have high mechanical strength. The flexural strength of sintered alumina ceramic products can reach 250MPa, and that of hot-pressed products can reach 500MPa. The strength can be maintained up to 900℃ at high temperatures.
2. High alumina ceramics have a high resistivity and excellent electrical insulation performance. The resistivity at room temperature is 1015Ω·cm, and the insulation strength is 15kV/mm.
3.High hardness, with a Mohs hardness of 9.
zirconia ceramic roller bearing：
1.High strength and wear resistance: Zirconia ceramics have excellent hardness and strength, and can resist wear and damage under extreme conditions such as high pressure, high temperature, and high speed. Therefore, it has been widely used in mechanical parts, tools, bearings and other fields.
2.Corrosion resistance: Zirconia ceramics have good chemical stability and can resist the erosion of corrosive media such as acid and alkali. It is often used as reaction vessels, catheters and artificial joints in the fields of chemical industry and medical devices.
3.Excellent insulation properties: Zirconia ceramics are a non-conductive material with excellent insulation properties. It is widely used in electronic devices, ceramic capacitors, insulating rings and other fields.
