Adjustable Pore Size Activated Aluminum Oxide Super Fine Activated Gamma-Al2O3 for Activated Alumina Ball

Overview of Aluminum Oxide Al2O3     

Aluminum oxide (Al2O3), also known as aluminum oxide, is an inorganic compound formed by the combination of aluminum and oxygen elements. In nature, it mainly exists in various minerals, such as corundum and gemstones. The chemical formula of Al2O3 indicates that each aluminum atom combines with three oxygen atoms to form a stable hexagonal or cubic densest packing structure. This compound has extremely high hardness, high melting point, and good chemical stability.
Because of its excellent physical and chemical features, Al2O3 has been widely used in multiple fields. In industrial production, it is commonly used as a grinding agent, polishing agent, and refractory material. In the electronics industry, aluminum oxide is used as an insulating material and semiconductor substrate. In addition, Al2O3 is also a key raw material for manufacturing advanced ceramics, catalyst carriers, and advanced coatings. Due to its good biocompatibility and stability, alumina is also used in the medical field to manufacture artificial joints and dental implants.

(Aluminum Oxide Al2O3 CAS 1344-28-1)

Features of Aluminum Oxide Al2O3     

High hardness: Al2O3 is one of the hardest known oxides, second only to diamonds, making it very suitable as a grinding and polishing material.
High melting point: Aluminum oxide has a very high melting point, making it highly stable in high-temperature environments.
Good chemical stability: Aluminum oxide is stable to most chemical substances and is not prone to chemical reactions.
Excellent insulation: Al2O3 is an excellent insulation material with extensive applications in the electronic field.
Optical properties: Aluminum oxide has a high refractive index and high transparency, which can be used to manufacture optical components.

Parameter table of Aluminum Oxide Al2O3

Aluminum Oxide Properties
Other Names	alumina, aluminum (III) oxide, aluminum trioxide, Al2O3 powder
CAS No.	1344-28-1
Compound Formula	Al2O3
Molecular Weight	101.96
Appearance	White Powder
Melting Point	2072 °C
Boiling Point	2977 °C
Density	3.95 g/cm3
Solubility in H2O	N/A
Exact Mass	101.948 g/mol
Aluminum Oxide Health & Safety Information
Signal Word	N/A
Hazard Statements	N/A
Hazard Codes	N/A
Risk Codes	N/A
Safety Statements	N/A
Transport Information	NONH

Application of Aluminum Oxide Al2O3           

Grinding and polishing: The high hardness of Al2O3 makes it the main material for manufacturing abrasives, grinding wheels, and polishing agents.

Refractory materials: The high melting point of alumina makes it a key component in the manufacturing of refractory bricks, refractory ceramics, and refractory coatings.

Application of Aluminum Oxide Al2O3

Electronics industry: Al2O3 is used to manufacture integrated circuit substrates, insulation layers, and capacitors.

Ceramic Industry: Alumina ceramics have high hardness, wear resistance, and chemical stability, and are widely used in the manufacturing of cutting tools, grinding tools, and ceramic components.

Application of Aluminum Oxide Al2O3

Medical field: Aluminum oxide is used in the production of medical devices such as artificial joints, dental implants, and bone screws.

In the field of optics, the high refractive index and transparency of alumina make it an ideal material for manufacturing lenses, windows, and optical filters.

Production Method of Aluminum Oxide Al2O3

Bayer Process

This is the most common method. First, bauxite ore is crushed and mixed with sodium hydroxide (NaOH) solution. High pressure and heat break down the ore, separating aluminum compounds from impurities like iron oxide. Next, the mixture is filtered to remove solids. Then, cooling and adding seeds cause aluminum hydroxide (Al(OH)₃) to precipitate. Finally, heating Al(OH)₃ at 1,000°C removes water, forming pure Al₂O₃.

Sol-Gel Method

Aluminum alkoxide (e.g., aluminum isopropoxide) is dissolved in alcohol. Adding water starts hydrolysis, forming a sol. Over time, the sol becomes a gel. Drying and heating the gel at 400–600°C removes organic materials, leaving fine Al₂O₃ powder.

Chemical Vapor Deposition (CVD)

Aluminum chloride (AlCl₃) and oxygen are heated to 1,000–1,200°C. They react to form Al₂O₃ vapor, which condenses into thin films or powder on cool surfaces.

Electrolysis of Alumina

In the Hall-Héroult process, Al₂O₃ is melted with cryolite (Na₃AlF₆). Passing an electric current through the molten mix separates aluminum metal from oxygen, leaving Al₂O₃ residues that are collected and purified.

Each method suits different needs for purity, particle size, and cost.

 

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.

The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.

If you are looking for high-quality Aluminum Oxide Al2O3 , please feel free to contact us or click on the needed products to send an inquiry. 

Storage Condition of Aluminum Oxide Al2O3

Seal Tightly: Store in airtight containers like plastic bags or glass jars to block moisture and dust.

Keep Dry: Choose a dry area with humidity below 40% and temperatures between 15–25°C. Add silica gel inside containers if needed.

Avoid Reactive Substances: Separate from acids, bases, and reducing agents to prevent chemical reactions.

Prevent Clumping: Store in stable, non-vibrating spots to avoid particle clumping.

Shield from Heat/Light: Place in fabulous, shaded locations away from direct sunlight and heat sources.

Payment Term

L/C, T/T, Western Union, Paypal, Credit Card etc.

 

Shipment Term

By sea, by air, by express, as customers request.

5 FAQs of Aluminum Oxide Al2O3

Q1

What is the primary reason for the high hardness of Aluminum Oxide (Al2O3)?

Answer: The high hardness of Aluminum Oxide (Al2O3) is primarily attributed to its strong covalent bonding between aluminum and oxygen atoms. This strong bonding results in a material that is extremely resistant to scratching and wear, making it an excellent material for abrasives and cutting tools.

Q2

How does Aluminum Oxide (Al2O3) differ from other oxides?

Answer: Aluminum Oxide (Al2O3) differs from other oxides in its unique combination of properties. It has a high melting point, excellent chemical stability, and high hardness, which are not typically found together in other oxides. Additionally, Al2O3 has a unique crystal structure that gives it its unique optical and mechanical properties.

Q3

In what industries is Aluminum Oxide (Al2O3) commonly used?

Answer: Aluminum Oxide (Al2O3) is commonly used in several industries, including abrasives and polishing, refractory materials, electronics, ceramics, and the medical industry. It is used in abrasives and polishing due to its high hardness, in refractory materials because of its high melting point, and in electronics for its insulating properties. In ceramics, it is used to make high-performance ceramic components, and in the medical industry, it is used in implants due to its biocompatibility.

Q4

How does Aluminum Oxide (Al2O3) affect the performance of electronic devices?

Answer: Al₂O₃ improves electronic devices in several ways. First, it insulates well. This stops electricity from moving where it shouldn’t. Second, it carries heat. This helps devices stay cool. Third, it’s very hard. This protects parts from scratches and damage. Fourth, it doesn’t react easily. This keeps it stable in different conditions. Engineers use these traits to build better components. They choose Al₂O₃ for things like circuit boards and heat sinks. It helps devices work longer and better.

Q5

How does Aluminum Oxide (Al2O3) contribute to the durability of cutting tools?

Answer:Aluminum oxide is really hard. When it’s part of a cutting tool, it can resist wear. Hard materials don’t get scratched or chipped easily. So, cutting tools with aluminum oxide can keep their sharp edges for a long time. This is because aluminum oxide can stand up to the forces during cutting. That’s how it makes cutting tools more durable.