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Formula: Al₂O₃
Form: Granule
Material: Alumina
CAS Number: 1344-28-1
Commodity: Ceramics
Purity: 99.99%
Nominal Granule Size: 1-3mm
Type: Injection Moulding
Goodfellow's Alumina Granules consist of high-purity aluminum oxide (Al₂O₃) particles tailored for use in a variety of industrial applications requiring thermal stability or chemical inertness. These granules exhibit excellent resistance to high temperatures up to 1800°C as well as resistance to corrosion by acids or alkalis, ensuring long-term performance under harsh conditions. Alumina granules are widely utilized as raw materials for producing refractories, catalysts supports, or advanced ceramic components like insulators or filters in industries such as petrochemicals or energy generation systems like gas turbines where durability matters most significantly . Specific examples include their inclusion within catalyst beds where they enhance reaction efficiency or integration into composite materials improving structural integrity under stress factors . Their versatility combined with proven reliability underscores why aluminas granular forms remain vital resources supporting technological progress across diverse sectors globally .
Technical Data Sheet Safety Data Sheet Tolerance Properties
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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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