What is the Aluminium Oxide?
Aluminium Oxide Powder(Al2O3), often referred to as alumina powder, is a white, odorless, and tasteless crystalline compound that is widely used in industrial applications.It is an important inorganic oxide material.

How to make Aluminium Oxide powder?
There are many methods for the preparation of alumina powder, among which the most commonly used methods include vapor deposition and chemical conversion.
Vapor deposition: Aluminum element is volatilized by high temperature heating, and then deposited into alumina powder at low temperature. This method requires the use of special equipment, such as vacuum reactors or plasma reactors, to control temperature and atmosphere conditions. Vapor deposition method is suitable for the preparation of alumina powder with high purity and uniform particle size.
Chemical conversion method: The conversion of aluminum on the surface of aluminum or aluminum alloy into aluminum oxide powder by chemical reaction. The commonly used chemical conversion methods include acid leaching and alkali leaching. This method is suitable for large-scale production and has the advantages of low cost and high efficiency.

Properties of Aluminium Oxide powder
Aluminium Oxide is composed of aluminium and oxygen atoms arranged in a corundum structure, which is a type of crystalline form characterized by high hardness and strength. This structure provides Al2O3 with its exceptional mechanical and thermal properties.
Alumina powder has the following main properties:
Physical properties: Aluminium Oxide powder is white powder, the main component is Al "O", its content is usually more than 98%. It has high melting point (about 2000 ℃), high boiling point (about 2980 ℃) and high hardness (Morse hardness 9). It has Low Thermal Expansion，Al2O3 exhibits minimal expansion upon heating, which is crucial for applications requiring dimensional stability.In addition, alumina powder also has excellent insulation and stability .
Chemical properties: Aluminium Oxide powder has many crystal forms, such as α-Al₂O₃、γ-Al₂O₃and β-Al₂O₃. Among them,  α-Al₂O₃is the most stable crystal form of alumina and has a hexagonal O-layer structure. γ-Al₂O₃and β-Al₂O₃will eventually be transformed into α-Al₂O₃at high temperature.

What is the application of Aluminium Oxide?
Due to its properties, Aluminium Oxide powder is used in a wide range of applications, including:
Ceramics and Refractories: Used in the production of ceramic and refractory materials that can withstand high temperatures and mechanical stress.

Aluminium Oxide Powder used in Ceramics and Refractories

Abrasive Materials: Al2O3 is a component of abrasive wheels, sandpapers, and grinding compounds.
Polishing Agents: It is used in polishing pastes and compounds for the finishing of various materials.
Electronic Components: Al2O3 serves as a substrate material for integrated circuits and as an insulating layer in electronic devices.
Biomedical Applications: It is used in orthopedic implants, dental fillings, and other medical devices due to its biocompatibility and wear resistance.
Catalysts and Catalyst Supports: Al2O3 is used as a catalyst in various chemical processes and as a support for other catalysts.
Optics: It can be used to manufacture transparent ceramics for high-intensity lamps and windows for high-energy lasers.
Paints and Coatings: It improves the wear resistance and durability of paints and coatings.
Aluminium Oxide powder is a critical material in modern industry, serving as a foundation for a variety of products and applications that require high performance under demanding conditions.

 
Aluminium Oxide Powder used in paints and coatings

At the same time, alumina powder needs to pay attention to safety in the process of use. Long-term inhalation of alumina powder can lead to health problems such as Schaefer's disease (pneumoconiosis caused by aluminum silicate). Therefore, appropriate protective equipment should be worn when handling and using alumina powder to ensure good ventilation in the working environment.
 
What is the price of Aluminium Oxide?
The price of Aluminium Oxide powder (Al2O3) is usually affected by many factors, including its purity, particle size, production process and market supply and demand. According to the previous information, the price of alumina powder can range from a few yuan to dozens of yuan per kilogram.
Specifically:
Purity: The price of alumina powder with high purity, such as 99.9% or more, is significantly higher than that of low purity products.
Particle size: Finer alumina powders tend to be more expensive because of their more complex preparation process and higher cost.
Market demand: The fluctuation of demand for alumina powder in different industries will also have an impact on its price. For example, if there is a period of increased demand for high-purity alumina for 3D printing, electronics or medical industries, it may push up the price of the corresponding products.
Please note that prices fluctuate with time and market conditions. Therefore, in order to obtain the most accurate current market price, it is recommended to consult the supplier directly or check the latest market quotation. In addition, when buying large quantities, you can usually negotiate a better price, and different suppliers may provide different services, such as custom size, packaging, etc., which may also affect the final transaction price.

High-quality Aluminium Oxide powder supplier
TRUNNANO is a trusted global chemical materials supplier and manufacturer with over 12 years of experience in ultra-high quality nanomaterials and chemicals. The company develops a variety of powder materials and chemicals. OEM service is available. If you need aluminium oxide powder, please get in touch with us.