Sustainable Production Methods for Alumina Powder: Challenges and Opportunities
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| CAS No.: | 1344-28-1 |
| EINECS: | 215-619-1 |
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Basic Info.
- Model NO.
- LX0019
- Classification
- Alumina
- Grade Standard
- Industrial Grade
- Kind
- No Salt Oxide
- Quality
- First Class
- Al2O3
- 99.8%
- Transport Package
- Plastic Bag or Ton Bag
- Origin
- China
- HS Code
- 2818000000
- Production Capacity
- 2000ton/Month
Product Description
Alumina Powder - The Foundation of Many Types of Ceramics
Alumina powder serves as the cornerstone of many types of ceramics, such as engineered ceramics. Due to its resistance to both heat and chemical reactions, this material makes an ideal base.
Alumina powder with high circularity and an intricate microstructure excels at additive manufacturing (AM), thanks to improved flowability.
High Temperature Resistance
As it boasts an exceptionally high calorific value, alumina powder is used in fuels and explosives for rocket propellants and pyrotechnics, decorative reflective paints and pigments as well as microfine grades for use in refractory materials to fill voids between other particles and increase density.
Refractory materials made from Aluminum Oxide Powder provide excellent thermal insulation, chemical resistance, extreme hardness and high melting point - characteristics which make them popular choice for use in industrial furnaces and kilns where high temperatures, pressures and wear-and-tear wear is present.
Refractory alumina ceramics can be manufactured into blankets, boards, bricks and loose fiber forms to meet specific application needs. Furthermore, other materials like metals and plastics may be added in to improve performance at high-temperature environments. Unfortunately, due to its inherent brittleness, its widespread industrial usage remains limited - therefore new manufacturing processes and methodologies must be found for high-temperature insulation material synthesis and manufacturing techniques are necessary to keep up with industrial needs.
Corrosion Resistance
Alumina powder boasts high chemical inertness, making it resistant to most forms of corrosion, making it suitable for producing ceramic and wear-resistant coatings. Furthermore, its high melting point and shock resistance makes it applicable in multiple applications such as ceramic tiles and bulletproof vests.
Alumina's corrosion resistance stems from its ability to form a compact oxide layer on its surface, providing exceptional chemical resistance but remaining vulnerable against attacks from acidic and alkaline media.
Alumina is a naturally-occurring material found in the form of gibbsite, diaspore and boehmite minerals, while industrial grade alumina comes from bauxite and laterite deposits and then refined for use as ceramics, spark plug insulators, integrated circuit packages and refractory linings - as well as glassware production, laboratory ware and sandpaper grit production. Furthermore, alumina serves as a raw material in creating aluminum metal.
Hardness
Alumina ceramic (al2o3) is an invaluable raw material in industrial refractories and abrasives, offering outstanding wear resistance with its Rockwell hardness over 10 times greater than stainless steel and nearly double than high-chromium cast iron - two materials commonly considered the toughest on Earth.
Aluminum Oxide typically appears grey or off-white and comes in various particle sizes. Finer grades of alumina are often utilized by the refractory industry for filling voids and increasing density while coarser varieties serve as grinding aids.
Bauxite is mined and processed to produce Calcined Alumina, which is then melted to form aluminum metal and used as the starting point for many advanced ceramic products. Alumina is also widely used as raw material in producing alkali-free refractories; in polishing applications; as a carrier for catalysts; or used to polish surfaces like glasses.
Melting Point
Aluminium Oxide boasts an extremely high melting point of 2,072 degrees Celsius, making it an excellent material to construct products designed to withstand high heat or other demanding conditions. This makes Al2O3 Powder an excellent material choice when creating products with long lifespans or extreme conditions such as extreme cold.
Industrial alumina production usually follows the Bayer process, in which bauxite ore is refined into aluminum metal through dissolution with and sent to aluminum smelters for electrolysis while any remaining pieces are calcined for various ceramic applications like spark-plug insulators, integrated circuit packages, bone/dental implants and laboratory ware as well as abrasives, sandpaper grits grinding wheels and refractory linings for furnaces.
Hardness, chemical inertness and thermal stability make alumina an ideal material for creating bulletproof glass and body armor. Furthermore, its low comedogenic rating and low toxicity allow cosmetic use without fear of skin irritation; moreover it is often utilized in alumina-based refractory materials to produce fire retardants and protective coatings for machinery and industrial equipment.
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