Technical Specification of Aluminum Oxide Micron Powder (Al2O3, 99.5+%, 28 – 70 µm):
1. Product Name: Aluminum Oxide Micron Powder
2. Chemical Formula: Al₂O₃
3. Purity: 99.5% minimum
4. Particle Size: 28 – 70 µm
5. Appearance: White, fine powder
6. Specific Surface Area: Typically varies depending on particle size and manufacturing method
7. Density: Approximately 3.95 g/cm³
8. Melting Point: 2,072°C (3,762°F)
9. Boiling Point: Sublimation point is around 2,977°C (5,391°F)
10. Refractive Index: 1.765 (at 589 nm)
11. Mohs Hardness: 9 (high hardness, nearly as hard as diamond)
12. Electrical Conductivity: Insulator (high electrical resistivity)
13. Thermal Conductivity: 30 W/(m·K)
14. pH (in water): 7 (neutral)
15. Packaging: Typically available in sealed bags or drums to prevent contamination and moisture absorption.
Applications of Aluminum Oxide Micron Powder (Al₂O₃, 99.5+%, 28 – 70 µm):
- Abrasives:
- Due to its hardness (Mohs hardness of 9), aluminum oxide powder is used extensively in abrasives such as sandpapers, polishing compounds, and grinding wheels. It is especially effective in industries like metalworking, ceramics, and glass polishing.
- Refractory Materials:
- Aluminum oxide has a very high melting point, making it ideal for use in refractory materials for furnaces, kilns, and other high-temperature applications, particularly in the steel and aluminum industries.
- Ceramics and Composites:
- Used in the production of high-performance ceramics, aluminum oxide provides enhanced durability and thermal stability. It is often used in semiconductor substrates, wear-resistant parts, and composite materials.
- Electronics:
- Due to its insulating properties and high thermal conductivity, it is used in the manufacture of electrical insulators, substrates for electronic components, and LED packaging.
- Polishing and Coatings:
- It is a key material in the polishing and finishing of metals, glass, and gemstones. Micron-grade powders are used in precision polishing of optical lenses and semiconductor components.
- Catalysts and Catalyst Supports:
- Aluminum oxide is used as a support for catalysts in various chemical processes, including petroleum refining and the production of chemicals such as hydrogen, ammonia, and others. Its large surface area aids in catalysis.
- Water Filtration:
- In some applications, aluminum oxide is used as a filtration medium for water purification, as it has the ability to remove impurities from water and other liquids effectively.
- Thermal Insulation:
- Due to its excellent thermal properties, aluminum oxide is employed in high-performance thermal insulation applications, such as thermal barriers in gas turbines or engines.
- Batteries and Energy Storage:
- In battery technologies, especially for lithium-ion and sodium-ion batteries, aluminum oxide is sometimes used in the form of a coating to improve the stability and performance of battery electrodes.
This combination of properties makes aluminum oxide micron powder versatile for a wide range of industrial and technological applications.
