High-Purity Aluminum Oxide (Al₂O₃)

Aluminum oxide (Al₂O₃), commonly referred to as alumina, is a white, odorless crystalline powder valued for its exceptional chemical stability, high melting point, and excellent mechanical strength. These properties make it an essential advanced material across a wide range of hightechnology applications.

Specialty aluminas are widely used in refractories, advanced ceramics, highpressure sodium lamps, luminescent materials, protective coatings, catalysts, polishing and abrasive products, and synthetic sapphire growth. Highpurity grades are also critical for producing phosphors used in color plasma display panels (PDPs) and other optoelectronic components.

Highpurity aluminum oxide typically refers to materials with 99.999% to 99.9999% purity. At these purity levels, alumina is primarily used for:

• Synthetic sapphire crystal growth (for LEDs, optical windows, substrates, and watch crystals)
• Phosphor production for color PDPs and other display technologies
• Growth of laser crystals and other precision optical materials

Its controlled impurity profile and consistent particle characteristics make highpurity Al₂O₃ indispensable in semiconductor, photonics, and advanced materials manufacturing.

General Properties 

Properties	Value
Chemical formula	Al2O3
CAS Name	1344-28-1
EC / EINECS Number	215-691-6
Molar mass	101.96 g·mol−1
Appearance	White solid
Melting point	2,072 °C (3,762 °F; 2,345 K)
Boiling point	2,977 °C (5,391 °F; 3,250 K)
Density	3.95–4.1 g/cm3
Solubility in water	Insoluble
Solubility	Insoluble in all solvents

Product Availability

We provide high-purity Aluminum Oxide (Al₂O₃) tailored for semiconductor and industrial requirements. 

Purity	99.999% – 99.9999%
Forms	Powder
Normal Particle sizes	From -50 mesh to -325 mesh
Nanoparticle Sizes	From 0.2 – 20um
Package	Small packs or upon request

If you are in need of any high purity Aluminum Oxide (Al₂O₃), please contact our sales team for details at sales@american-gmg.com.