Aluminum oxide or alumina is an oxide ceramic material. It possesses excellent strength, wear, corrosion resistance, and electrical properties. Combined with an affordable price, alumina is one of the most widely used oxide ceramic materials with the highest output now.
Alumina PowderIf you want to know why alumina is so popular, or are finding a durable material for your industrial production, this article will introduce the characteristics, uses, and values of alumina to you, demonstrating why it is popular in modern industries.
Properties of Alumina
Alumina plays an important role in modern industry. It is mainly because of its comprehensive properties. The characteristics of alumina ceramics precisely meet the strict demands of different industrial production, providing an excellent performance compared to ordinary ceramics and metallic materials.
High Hardness and Wear Resistance
Alumina possesses a high hardness of Mohs 9. Its wear resistance far exceeds that of manganese steel and high-chromium cast iron. The service life of alumina ceramics is more than 10 times longer than quenched steel.
In abrasive conditions like the quartz sand transportation in mines, the wear rate of alumina ceramic liners is only 1/20 than ordinary steel liners. Using alumina ceramic products can extend the service life of your equipment, reducing maintenance costs significantly.
High-Temperature Resistance
Alumina provides excellent thermal resistance. 99 alumina can withstand 1,600℃. High-purity ones operate stably even at 1,750℃. It ensures the stable operation of your equipment under extreme temperatures.
Besides, alumina is resistant to deformation under high temperatures. It is suitable for high-temperature furnaces, heat exchangers, and metallurgical crucibles with various high-temperature requirements.
Corrosion Resistance
Alumina has excellent corrosion resistance. It is only slightly soluble in strong acid and alkaline solutions. When placed in 30% sulfuric acid solution for a year, alumina loses just less than 0.01g in weight.
Besides, alumina can help effectively resist the erosion from high-temperature flue gases, preventing equipment failure caused by material loss.
Electrical Insulation
Alumina possesses excellent electrical insulation properties. A volume resistivity as high as 1015 Ω·cm at room temperature, combined with its outstanding thermal conductivity, makes it preferred for high-frequency insulating materials. Alumina ceramics can meet the insulation requirements of fields such as electronics, semiconductor manufacturing, and 5G communications. Insulating brackets, ceramic substrates, and electronic component packaging materials made of alumina ensure stable circuit transmission.
Customizability
Alumina ceramic can be modified by changing its purity. The higher the purity, the higher the performance. Moreover, the processing technology of alumina is highly mature today. Alumina ceramic can be manufactured into various customized parts, such as liners, pipes, and seals, to meet the special requirements of different industrial environments.
Various Alumina Ceramic Products in the StorehouseApplications of Alumina in Modern Industry
Alumina has a profound influence across multiple industrial sectors. Different alumina purities and specifications can precisely meet the requirements of various industries. Below are some main applications.
Mechanical Manufacturing
95% or 99% alumina ceramics components, such as wear-resistant liners, sealing rings, bearings, and grinding media, can effectively reduce the frictional loss during operation, decreasing the frequency of component replacement.
The high-temperature resistance of alumina ceramics allows them for the linings of high-temperature furnaces and heat exchanger components, ensuring the stable operation of high-temperature processing equipment.
In a field measurement application at a gold mine, traditional steel liners were punctured after 8 months. After changing alumina ceramic liners, they operate continuously for 5 years with a wear amount of less than 0.5 mm. Using alumina can reduce your maintenance costs and downtime losses.
Electronics
Alumina can be used to manufacture insulating brackets and substrates. These components are most for integrated circuits and high-frequency electrical appliances. Its electrical insulation and thermal conductivity combine to ensure the stable transmission, as well as reduce the risks of leakage and overheating.
Ultra-high-purity alumina is employed in high-end electronic components. For example, sodium lamp tubes and laser windows. Such high-purity alumina can meet the requirements of high-precision electronic equipment.
In 5G base station high-frequency signal transmission, alumina ceramic substrates can reduce system thermal resistance by 40%, enhancing equipment operational stability.
Chemical Processing and Metallurgy
Alumina is also designed into parts that withstand harsh, corrosive working conditions. It has excellent corrosion resistance. Using alumina ceramic pipes, valves, and reaction vessel liners can help you avoid issues of leaks and corrosion.
In metallurgy, alumina is used for high-temperature-resistant crucibles and furnace tubes. They can stably operate at temperatures up to 1500℃ with resistance to molten steel and slag. You will achieve continuous metallurgical production with alumina products.
Semiconductors and New Energy
Alumina is one of the main materials in semiconductor manufacturing. High-purity alumina ceramic etching trays can control the iron content of wafers to below 5 ppm. It effectively solves the metal ion contamination in chip fabrication.
Case: A factory switched to using alumina ceramic trays. The wafer contamination rate dropped significantly, saving over 5 million USD every year in maintenance costs.
The Production Processing of Alumina Wafer TraysIn the production of new energy batteries, alumina ceramic injection pumps can operate continuously for 18 hours. It helps to improve injection accuracy from ±1.5% to ±0.3%. Moreover, alumina will form a thermal insulation layer to ensure battery safety.
Other Fields
Alumina also plays an important role in aerospace, medical, and other fields. Thermal protection components, industrial wastewater adsorption materials, and artificial joint coatings all rely on the support of alumina ceramics.
Why Has Alumina Become a Universal Material?
Alumina’s wide application in modern industry is mostly because of its comprehensive properties and flexibility. Its high hardness, high-temperature resistance, corrosion resistance, and insulating properties precisely meet the rigorous demands of various industrial fields.
Besides, the costs of alumina have been continuously optimized with breakthroughs in alumina ceramic production technology. Alumina thus offers better cost-effectiveness than other high-performance ceramic products.
Appropriate ceramic material will help you improve equipment stability, reduce maintenance costs, and optimize product performance effectively.
Newthink New Materials has 14 years of experience in advanced ceramic products. Contact us to get the latest quotations for alumina ceramic products.
Alumina Products Manufacturing WorkshopThanks for your reading. Hope this article will be helpful.
FAQs
- What is alumina used for?
Alumina is mainly used to produce metal aluminum through smelting. It has various uses in furnace linings, electronic substrates, high-temperature crucibles, and other industrial products.
- Is alumina the same as aluminum?
No. Aluminum is a lightweight metal. Alumina is a hard ceramic material.
- What are the disadvantages of alumina?
Alumina will crack under sudden mechanical impact. Complex shapes may be difficult.
- Is alumina bulletproof?
Yes. Alumina is often used with composite materials to stop bullets.
- Is alumina flammable?
No. Alumina maintains stability under extreme temperatures.
- What temperature can alumina withstand?
Standard 99% alumina withstands 1,600℃. High-purity ones operate stably at 1,750℃. It remains resistant to deformation even under such extreme thermal conditions.
