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Alumina Sheet

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Commodity: Ceramics Material: Aluminum Oxide Form: Foil/Film/Sheet Composition: Al₂O₃ CAS Number: 1344-28-1
Alumina Sheet is a high-purity aluminum oxide ceramic form characterized by exceptional hardness, electrical insulation capability, and resistance to high temperatures and corrosive environments. Produced through advanced sintering or casting methods, it offers a uniform microstructure with precise dimensional stability, making it ideal for high-performance engineering applications. Its high thermal conductivity and ability to withstand rapid temperature changes without warping or cracking make it a preferred choice for electronic substrates, furnace liners, and high-vacuum system components. Alumina Sheet is widely used in electronics manufacturing, optics, and aerospace, serving as insulating plates, laser system mounts, and protective barriers in thermal processing equipment. In research, engineered variants such as porous alumina sheets are being developed for enhanced heat dissipation in high-power LED systems, where integration with metals or advanced composites further improves performance. The combination of mechanical strength, chemical inertness, and thermal reliability ensures Alumina Sheet’s continued relevance in cutting-edge industrial and scientific applications.
Starting at $177.00 each
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Material Properties

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
each

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Available Configurations

Properties common to all products in this list

Commodity: Ceramics Material: Aluminum Oxide Form: Foil/Film/Sheet Composition: Al₂O₃ CAS Number: 1344-28-1

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Tolerances

Foil/Film/Sheet
Thickness ±20%