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Formula: Al₂O₃
Form: Powder
Material: Alumina
CAS Number: 1344-28-1
Commodity: Ceramics
Goodfellow's Alumina Spherical Powder is an advanced ceramic material known for its high purity, uniform particle shape, and excellent flowability. This powder consists of fine, spherical particles of aluminum oxide (Al2O3), which exhibit exceptional hardness, thermal stability, and chemical inertness. The spherical morphology of the particles contributes to improved packing density and sintering characteristics, making it valuable for various specialized applications in advanced ceramics and materials processing. Alumina Spherical Powder finds extensive use in industries such as advanced ceramics manufacturing, 3D printing, and surface coating technologies. In ceramic production, it serves as a key raw material for creating high-performance components with improved mechanical properties and dimensional accuracy. The additive manufacturing industry utilizes it in selective laser sintering (SLS) processes to produce complex ceramic parts with high precision. In surface engineering, it's used as a feedstock for thermal spray coatings, providing wear-resistant and thermally insulating layers. Cutting-edge research explores its potential in developing advanced catalyst supports, high-performance filters, and novel biomedical implants. The unique properties of Alumina Spherical Powder make it a focus of ongoing research and development efforts in materials science and engineering. Its significance in both industrial applications and scientific investigations underscores its importance in advancing technologies that require materials with precise particle morphology and exceptional ceramic properties.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Powder
Mean Particle Size Nominal
Minimum Particle Size Nominal
Maximum Particle Size Nominal
Maximum Particle Size Nominal
Particle Size D10 Nominal
Particle Size D50 Nominal
Particle Size D90 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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