alumina ceramics advantages and disadvantages
Alumina ceramics is a kind of ceramic material with alumina (Al2O3) as the main body, which is used in thick-film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. Its Rockwell hardness is HRA80-90, which is second only to diamond, and far exceeds the wear resistance of wear-resistant steel and stainless steel. Zirconia ceramic knife is a kind of tool made of special ceramic material. It can process quenching material. Alumina ceramic material is used to make high temperature crucible, refractory furnace tube and special wear-resistant material, such as ceramic bearings, ceramic seals and water valve sheets.
Industrial Ceramics-Alumina Ceramics Advantages and Disadvantages
1. The Rockwell hardness of alumina ceramics is HRA80-90. The hardness of alumina ceramics is second only to that of diamond, which far exceeds the wear resistance of wear-resistant steel and stainless steel.
2. The wear resistance of alumina ceramics is excellent, which is 266 times that of manganese steel and 171.5 times that of high chromium cast iron. According to our customer tracking survey for more than ten years, under the same working conditions, the service life of the equipment can be extended at least ten times.
3. Alumina ceramics are light in weight and have a density of 3.5g/cm3, which is only half that of iron and steel. It can greatly reduce equipment load.
4. Alumina ceramics are high temperature resistant and can be used for a long time at 1600 degrees.
5. Alumina ceramic has strong corrosion resistance.
6. Alumina ceramics have good electrical insulation performance, especially at high temperature. The thickness of alumina ceramics can withstand over 8000V voltage per millimeter.
7. Alumina ceramics have low toughness, poor thermal shock resistance, and can not withstand drastic changes in temperature. (shortcomings)