What are the advantages of alumina wear-resistant ceramics?
Release time:
2021/11/12
Extremely high hardness: The hardness of alumina ceramic is second only to diamond, far exceeding traditional metal materials such as wear-resistant steel and stainless steel.
Alumina wear-resistant ceramics have significant advantages over other wear-resistant materials, and the following is a detailed explanation of these advantages:
1. High hardness and wear resistance
Extremely high hardness: The hardness of alumina ceramics is second only to diamond, far exceeding traditional metal materials such as wear-resistant steel and stainless steel. Its Rockwell hardness can reach HRA80-90, with hardness comparable to corundum, achieving a Mohs hardness of 9.
Superior wear resistance: Tests show that the wear resistance of alumina wear-resistant ceramics is equivalent to 266 times that of manganese steel and 171.5 times that of high-chromium cast iron. Under the same working conditions, using alumina ceramic wear parts can extend the equipment's lifespan by at least ten times.
2. Good chemical stability
Alumina ceramic wear parts have good stability against most acids, bases, salts, and other chemicals, making them less prone to chemical reactions. This characteristic gives them a significant advantage in chemical industries where corrosion resistance is required.
3. High-temperature resistance
Alumina ceramic wear parts can operate for long periods in high-temperature environments without deforming or failing. This makes them more widely applicable in high-temperature working environments, such as coal-fired power plant mills and ash discharge pipelines.
4. Low friction coefficient
The surface of alumina ceramic wear parts is smooth, with a low friction coefficient, effectively reducing wear and friction heat, thereby improving equipment operating efficiency.
5. Excellent insulation properties
Alumina ceramics are good insulating materials, characterized by low high-frequency loss and good high-frequency insulation.
6. High thermal conductivity and mechanical strength
Alumina ceramics have a small thermal expansion coefficient, high mechanical strength, and good thermal conductivity, allowing them to maintain stable performance in harsh environments of high temperature and pressure.
7. Lightweight
The density of alumina ceramics is 3.7~3.95g/cm³, only half that of steel, significantly reducing equipment load and enhancing flexibility and mobility.
8. Wide range of applications
Alumina ceramic wear parts are suitable for various harsh working environments and usage scenarios, such as high temperature, high humidity, and strong corrosion, meeting the needs of different industries. They have extensive applications in machinery, fiber optics, tools, medical, food, chemical, aerospace, and other fields.
9. High cost-performance ratio
Alumina ceramic wear parts are produced in large quantities, offering a high cost-performance ratio. They generate less wear during use, reducing the frequency of equipment maintenance and replacement, thus lowering production costs.
10. Energy-saving and environmentally friendly
The use of alumina ceramic wear parts also reflects the concept of energy saving and environmental protection. Due to their superior wear resistance and long service life, they reduce resource waste and environmental pollution.
In summary, alumina wear-resistant ceramics have many significant advantages, making them indispensable in modern industrial production.
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