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Formula: Al₂O₃
Form: Pellet/Lump
Material: Aluminum Oxide
CAS Number: 1344-28-1
Commodity: Ceramics
Maximum Lump Size: 3mm
Weight: 200g
Alumina Pellets are high-purity aluminum oxide formed into spherical or near-spherical shapes, offering a combination of high surface area, controlled porosity, and excellent thermal and chemical stability. Advanced manufacturing techniques, such as hot oil column molding and sintering, produce pellets with uniform size distribution and optimized pore structures for catalytic, adsorptive, and refractory applications. These pellets are widely used in petrochemical processing, environmental remediation, and high-temperature industrial operations. Key uses include catalyst supports in reforming reactions, adsorbents for water purification and gas drying, and packing media in high-temperature reactors. The material’s inherent resistance to chemical attack and structural degradation under thermal cycling ensures long operational life in harsh environments. Ongoing innovations in pore architecture and surface chemistry continue to expand the performance envelope of Alumina Pellets, cementing their importance as a versatile and indispensable material for both industrial processes and research-driven applications.
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Tolerances

Pellets
Maximum Lump Size Nominal

Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alkalis Good
Halogens Good
Metals Good
Electrical Properties
Element Value
Dielectric constant 9-10.1
Dielectric strength( kV mm⁻¹ ) Oct-35
Volume resistivity( Ohmcm ) >10¹⁴@25
Physical Properties
Element Value
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 3.9
Thermal Properties
Element Value
Melting point( C ) 2100
Upper continuous use temperature( C ) 1700
Specific heat( J K⁻¹ kg⁻¹ ) 850-900@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 26-35@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 8@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 300-400
Hardness - Knoop( kgf mm⁻² ) 2100
Hardness - Vickers( kgf mm⁻² ) 1500-1650
Shear strength( MPa ) 330
Tensile strength( MPa ) 260-300
Pultrusions
Element Value
Compressive strength( MPa ) 2200-2600

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