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Alumina Bar

Goodfellow offers a range of alumina bars that are highly useful in engineering. Alumina, or aluminum oxide, is an extremely hard ceramic material with excellent wear and corrosion resistance. These alumina bars can withstand high temperatures and have good electrical insulation properties. With multiple sizes available, Goodfellow's alumina bars have applications in electrical insulators, wear parts and high temperature furnace components. The unique properties of these alumina ceramic bars make them ideal for demanding engineering needs.
Technical Name: Alumina
Formula: Al₂O₃
Density: 3.9g/cm³
CAS Number: 1344-28-1
Side Length: 20mm
Side Length (Of Longer Side): 25mm
Length: 736mm
UOM Code: 362-882-76
SKU: 1000022447
Product Code: AL60-BR-000125

Tolerances

Bar
Side Length =<10mm ±10%
Side Length >10mm ±1mm
Side Length (Of Longer Side) >10mm ±1mm
Side Length (Of Longer Side) =<10mm ±10%
Length <100mm ±1mm
Length >=100mm +5% / -1%
No Minimum order Despatch of products in stock within 48 hours Free technical support *Free delivery worldwide
€1,339.57
each
  • Buy 5 for €1,085.05 each and save 19%
  • Buy 10 for €991.28 each and save 26%

For larger quantities


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Tolerances

Bar
Side Length =<10mm ±10%
Side Length >10mm ±1mm
Side Length (Of Longer Side) >10mm ±1mm
Side Length (Of Longer Side) =<10mm ±10%
Length <100mm ±1mm
Length >=100mm +5% / -1%
Technical Data Sheet
Safety Data Sheet

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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