| Customization: | Available |
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| CAS No.: | 1344-28-1 |
| Formula: | Al2O3 |
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Aluminum oxide, commonly known as alumina, is a high-hardness ceramic compound with widespread industrial applications due to its thermal stability, electrical insulation, and chemical resistance.
Molar Mass: 101.96 g/mol
Appearance: White crystalline powder (corundum) or transparent crystals (sapphire/ruby)
Density: 3.95-4.1 g/cm³
Melting Point: 2,072°C
Boiling Point: 2,977°C
Hardness: 9 on Mohs scale (second only to diamond)
Solubility: Insoluble in water; reacts with acids/bases at high temperatures
Most stable form, produced by calcining aluminum hydroxide at >1,200°C.
Used in abrasives, refractories, and synthetic gemstones (rubies/sapphires).
Porous, high-surface-area form for catalysis and adsorbents.
Synthetic Methods:
Bayer Process: Refining bauxite ore with NaOH.
Electrolysis: Used to produce aluminum metal.
Industrial
Abrasives: Sandpapers, grinding wheels, and polishing compounds.
Refractories: Linings for furnaces (withstands >1,800°C).
Electronics
Insulators: Substrates for integrated circuits.
Medical & Consumer Goods
Bioceramics: Hip/knee implants (inert and wear-resistant).
Transparent Armor: Bullet-resistant windows.
Catalysis & Environment
Catalyst Support: For petroleum refining.
Water Purification: Adsorbs heavy metals.
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