Alumina ceramic (Al2O3) is a very wear-resistant precision ceramic material, which is widely used in all walks of life. The main molding methods of alumina ceramic products are: dry pressing, isostatic pressing, injection molding and casting, different product shapes, sizes, complex modeling and precision products need different molding methods. Alumina ceramic products sintered at high temperature can only be processed using diamond grinding process. The purity of common alumina ceramics is 90%-99.9%.
Advantages of alumina ceramics:
1, alumina ceramics have excellent insulation, high frequency loss is relatively small but good high frequency insulation characteristics;
2, alumina ceramics have heat resistance, with a small coefficient of thermal expansion, high mechanical strength and good thermal conductivity and other characteristics.
3, alumina ceramics have chemical corrosion resistance and molten gold properties.
4, alumina ceramics are non-combustible, stainless, strong and not easy to damage is has other organic materials and metal materials incomparable excellent properties.
5, the wear resistance of alumina ceramics, but the hardness is the same as that of corundum, which can reach Mohs hardness level 9 wear resistance comparable to superhard alloys.
Performance of alumina ceramic workpiece:
1, high hardness
After testing, the Rockwell hardness of alumina is HRA80-90, the hardness is only inferior to diamond, far more than the wear resistance of wear-resistant steel and stainless steel.
2, excellent wear resistance
The wear resistance of alumina ceramic material measured by the Powder Metallurgy Institute of Central South University of Technology 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, it can extend the service life of the equipment at least ten times under the same working conditions.
3. Light weight
The density of alumina ceramic material is 3.7~3.95g/cm³ Only half of the steel, but also can greatly reduce the load of equipment.
4, wide range of application
Alumina ceramics are widely used in machinery, optical fiber, cutting tools, medical, food, chemical, aerospace and other industries.
Common products are: sealing accessories, seats, mechanical parts, high temperature electrical insulators, high voltage insulators, electronic components and substrates, bulletproof armor, bearings, wear or corrosion resistant lining, semiconductor parts, laser cavity, tray, sandblasting nozzles, sharpeners, microwave components, friction-free clutches, high temperature kiln, etc.
1. Electronics industry:
Alumina ceramics are often used in the manufacture of electronic components, such as insulating substrates and packaging materials.
Its high insulation and high temperature resistance make it an important part of electronic equipment.
2. Mechanical manufacturing:
Alumina ceramics have a wide range of applications in the field of mechanical manufacturing, such as bearings, seals and ceramic tools.
Its high hardness and wear resistance can greatly improve the service life of mechanical parts.
3. Chemical industry:
Because of its excellent chemical stability, alumina ceramics are used as the lining material for chemical reactors and storage tanks in the chemical industry to prevent the erosion of chemical substances on the container material.
All in all, alumina ceramics have a wide range of application prospects in many industrial fields due to their high hardness, wear resistance, high temperature stability, chemical stability, insulation, mechanical strength and lightweight properties.
Its unique properties make it an indispensable material in many industrial applications.
The future development trend of alumina ceramics
1. Nanometer: With the development of nanotechnology, the preparation of nanometer alumina ceramics has become possible. Nano-alumina ceramics have better mechanical and optical properties, so they have great potential in manufacturing high-precision, high-performance products.
2. Composite materials: In order to further improve the performance of alumina ceramics, researchers began to study the composite of alumina ceramics with other materials. By combining with other materials, the toughness, high temperature resistance and other properties of alumina ceramics can be effectively improved.
3. Application in the field of environmental protection: With the continuous improvement of environmental awareness, the application of alumina ceramics in the field of environmental protection has also attracted more and more attention. For example, the use of alumina ceramics to make catalyst carriers, filter media and adsorbents can effectively improve environmental efficiency.
4. Biomedical applications: In recent years, alumina ceramics have also begun to be applied in the biomedical field. In short, as a kind of high-performance ceramic material, alumina ceramics have a wide range of application prospects. In the future, with the continuous progress and development of technology, alumina ceramics will be applied in more fields and play a greater role.
The hardness of alumina ceramics is high, the brittleness of the material is large, and it is easy to collapse and fracture during processing. Usually, ceramic parts are processed using special ceramic engraving machining, which can effectively reduce costs and achieve high precision machining. Ceramic CNC self-developed a special ceramic engraving and milling machine for ceramic processing, which has good protection performance and high processing precision. The ceramic engraving and milling machine strengthens the rigidity of the machine tool, and the vibration generated during processing can be reduced to the minimum, which can also improve the processing efficiency while ensuring the accuracy, and the protective performance is strengthened for the ceramic powder, which can completely eliminate the damage of the powder to the machine tool. CNC can also provide ceramic processing technology, with a skilled CNC machining, grinding team, precision parts research and development of custom processing.
Purity is very important for alumina ceramics. Higher purity alumina materials have more outstanding quality. We offer alumina in a wide range of purity grades, the most popular of which include 96%, 99.5% and 99.8%.
96% alumina Features: 96% alumina is widely used and its main benefits include excellent wear resistance, high temperature resistance and corrosion resistance. It also has good electrical insulation characteristics and is widely used in many electric heating element applications. In addition, due to its relatively low purity, the price is generally more affordable and still excellent in terms of component cost and life performance.
99.5% Alumina Features: 99.5% high purity alumina is another common purity level. It has the same advantages as low-purity alumina, such as wear resistance, high temperature resistance and electrical isolation, but its performance is slightly improved and it is often used in more demanding applications.
99.8% alumina Features: 99.8% alumina is also one of the commonly used high purity grades. Similar to 99.5% purity, this material offers greater resistance and strength in thin materials and is ideal for precision applications.
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