Alumina powder (Al₂O₃) is a chemically stable and thermally durable material with a purity of 99%. It appears as a fine white powder and is ideal for various industrial applications, including ceramics, refractories, abrasives, and polishing compounds. With a high melting point of 2,072°C, it offers excellent heat resistance and mechanical strength. The product is easy to store at room temperature and retains its properties over time. Its consistent particle size and high purity make it suitable for demanding processes where performance and reliability are essential.
Alumina Powder Product Specifications
The physicochemical index standards：Q/CHALCO-SD A016-2012
Activated alumina Powder is produced by activation roasting process, with hydraulical property, mainly used for refractory castable, advanced ceramic binder, catalyst support, and medical absorbent and specific catalysts. The main crystal phases include X-ρ, and γ-phase alumina.
| crystal phases | Chemical composition ％ | BETm2/g≥ | Pore Volume ml/g≥ | Crushing strengthN/Pieceμm | ||||
| Al2O3≥ | SiO2≤ | Fe2O3≤ | Na2O≤ | L.O.I≤ | ||||
| ρ-AO | 60* | 0.05 | 0.02 | 0.40 | ≤10 | 180 | 0.16 | 8-12 |
| γ-AO | 92 | 0.10 | 0.05 | 0.70 | 6 | — | — | — |
| *Comment:60 is for theρ-Al2O3 composition | ||||||||
If you are willing to wholesale quality, advanced and durable activated alumina powder from one of the famous China activated alumina powder manufacturers, BANLANCHEM is always at your service.
Price and Quantity
Our high-purity alumina powder is available for bulk purchase at competitive pricing. The minimum order quantity is 1,000 kilograms, making it ideal for industrial-scale applications. We offer reliable supply, consistent quality, and customizable packaging options to meet your production needs.
Product Description
With the support of experienced professionals, we have become a trusted manufacturer and supplier of high-quality Alumina Powder. This product plays a vital role in various industries and is commonly used in agricultural fertilizers, herbicides, pesticides, corrosion-resistant and heat-resistant coatings, conductive pastes, surface treatment of materials, and in the production of self-sustaining high-temperature composite materials.
We offer this alumina powder in multiple packaging options to meet customer needs, and at highly competitive prices.
Aluminum oxide, commonly known as Alumina Powder (Al₂O₃), is a key ingredient in aluminum production and is widely valued in industrial applications for its remarkable hardness, resistance to rust and wear, and reliable thermal and electrical conductivity.
Key Applications
- Abrasives and coatings: Thanks to its strength and hardness, alumina is ideal for making abrasive materials and wear-resistant surface coatings.
- Refractory materials: Its high melting point makes it suitable for manufacturing heat-resistant products that can withstand extreme temperatures.
- Glass production: Adding Al₂O₃ in glass formulation enhances its strength and durability.
- Technical ceramics: Alumina’s chemical stability and thermal properties make it a preferred choice for producing durable, high-performance ceramics.
Processing Method
Our alumina is produced using the advanced Bayer process, where bauxite is treated with caustic soda under controlled pressure and heat to extract alumina compounds. These compounds are then further refined to obtain pure alumina crystals. A rotary kiln is used for high-temperature treatment (calcination), ensuring superior quality and consistency.
Notable Features
- Excellent thermal and electrical insulation
- Ideal for ceramic injection molding
- Outstanding resistance to corrosion and surface wear
Alumina Powder Properties
1. Chemical Composition
Composed of aluminum and oxygen; chemical formula: Al₂O₃
2. Appearance
A fine, white to off-white powder, typically crystalline; particle size varies based on production methods.
3. Purity
Available in high-purity grades (up to 99%), suitable for precision applications such as electronics and advanced ceramics.
4. Hardness
Exceptionally hard, ideal for use in environments that demand wear resistance.
5. Melting Point
Very high melting point: 2,072°C (3,762°F)
6. Thermal Conductivity
Efficient heat conductor; used in components requiring effective heat dissipation.
7. Electrical Insulation
Serves as a strong electrical insulator, widely used in electronic and electrical applications.
8. Chemical Stability
Resistant to most chemical reactions, ensuring long-term durability in various conditions.
9. Abrasion Resistance
Highly resistant to physical wear and surface damage due to its hardness.
10. Dielectric Strength
Exhibits strong dielectric properties, supporting its use in insulation components.
11. Optical Clarity
In its translucent or transparent form, alumina is used in optical applications such as lamp covers or sapphire glass.
12. Catalytic Properties
Certain forms act as catalysts or catalyst carriers in chemical reactions.
13. Sinterability
Capable of being sintered into dense, strong ceramic structures—essential for advanced ceramics and refractory products.
14. Moisture Resistance
Non-hygroscopic—does not easily absorb moisture, ensuring stability in humid environments.moisture from the air.
15. Are there safety considerations when handling alumina powder?
Ans: Users should follow safety guidelines provided by manufacturers. Dust inhalation should be minimized, and appropriate personal protective equipment should be used.
Alumina Powder FAQ:
1. What is alumina powder?
Ans: Alumina powder, also known as aluminum oxide powder, is a compound composed of aluminum and oxygen with the chemical formula Al2O3. It is a versatile material with various industrial applications.
2. What are the common uses of alumina powder?
Ans: Alumina powder is used in a wide range of applications, including ceramics, electronics, abrasives, refractories, catalysts, and as a filler in various materials.
4. How is alumina produced?
Ans: Purity levels can vary, but high-purity grades are often used in critical applications. Purity is typically expressed as a percentage of Al2O3 content.
4. How is alumina powder produced?
Ans: Alumina powder is commonly produced through the Bayer process, which involves extracting alumina from bauxite ore. Other methods include the thermal decomposition of aluminum hydroxide.
5. How should alumina powder be stored?
Ans: Alumina powder is generally not hygroscopic, but it is advisable to store it in a dry place to prevent moisture absorption. Proper labeling and adherence to safety guidelines are also recommended.
6. Can alumina powder be used as a catalyst?
Ans: Yes, certain forms of alumina exhibit catalytic activity and are used in catalyst applications.
7. Are there safety considerations when handling alumina powder?
Ans: Users should follow safety guidelines provided by manufacturers. Dust inhalation should be minimized, and appropriate personal protective equipment should be used.
8. What is the particle size of alumina powder?
Ans: The particle size of alumina powder can vary depending on the manufacturing process and specific requirements. It is often available in fine powders with a range of particle sizes.
9. Can alumina powder conduct electricity?
Ans: No, alumina is an electrical insulator. It has high dielectric strength and is widely used in electrical insulating applications.
10. Is alumina powder resistant to corrosion?
Ans: Yes, alumina is chemically inert and resistant to corrosion, enhancing its durability in various environments.
11. What is the melting point of alumina?
Ans: Alumina has a very high melting point, approximately 2,072 degrees Celsius (3,762 degrees Fahrenheit).
12. Can alumina powder be sintered?
Ans: Yes, alumina powder can be sintered to form dense, strong ceramics. This property is valuable in the production of ceramics and refractories.
13. Does alumina powder have abrasive properties?
Ans: Yes, alumina is known for its hardness and abrasion resistance, making it suitable for use in abrasive applications.
14. Are there different types of alumina powder?
Ans: Yes, there are various types of alumina powder with different properties, such as calcined alumina, reactive alumina, and tabular alumina, each tailored for specific applications.
15. Is alumina powder transparent?
Ans: In its transparent or translucent forms, alumina can be used in optical applications.
16. Is alumina powder safe for food or pharmaceutical applications?
Ans: Only specific grades of alumina are suitable for such uses. Always confirm with the supplier whether the powder meets food or pharmaceutical-grade standards.
17. What packaging options are available for alumina powder?
Ans: Alumina powder can be supplied in sealed bags, drums, or custom bulk packaging to meet different industrial needs.
18. Can alumina powder be customized based on application?
Ans: Yes, particle size, phase composition, and purity can be tailored based on the customer’s specific requirements.
19. What is the shelf life of alumina powder?
Ans: When stored properly in dry, cool conditions, alumina powder maintains its quality for several years without significant degradation.
20. Does alumina powder react with acids or bases?
Ans: Alumina is generally inert but may slowly react with strong acids or bases at high temperatures.
