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Formula: BeO 99.5
Form: Foil/Film/Sheet
Material: Beryllium Oxide
CAS Number: 1304-56-9
Commodity: Ceramics
Beryllium Oxide Sheet combines exceptional thermal conductivity, high dielectric strength, and mechanical robustness, making it an essential material in high-performance electronics, aerospace, and energy systems. Its ability to efficiently dissipate heat while maintaining electrical insulation makes it indispensable for power electronics, RF and microwave devices, and advanced semiconductor packaging. Industries use beryllium oxide sheets in applications such as high-frequency transistor substrates, insulating heat spreaders in radar systems, and thermal management layers in satellite communication hardware. Specific technologies benefiting include laser diode mounts, hybrid microcircuits, and high-power amplifier modules. In research, Beryllium Oxide Sheet is crucial for developing radiation-resistant insulating materials, investigating ceramic thermal transport mechanisms, and enabling high-temperature electronic device prototypes. The combination of superior thermal efficiency, electrical isolation, and mechanical stability ensures its status as a high-value material in demanding scientific and industrial environments.
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Tolerances

Foil/Film/Sheet
Thickness ±20%

Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Poor
Acids - dilute Fair
Alkalis Fair
Halogens Fair
Metals Good
Electrical Properties
Element Value
Dielectric constant 6.5-7.5
Dielectric strength( kV mm⁻¹ ) Oct-14
Volume resistivity( Ohmcm ) >10¹⁴@25
Physical Properties
Element Value
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0.07
Density( gcm⁻³ ) 2.86
Thermal Properties
Element Value
Upper continuous use temperature( C ) 1800-1900
Specific heat( J K⁻¹ kg⁻¹ ) 1020-1120@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 260-300@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 8.4-9@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 340-400
Hardness - Vickers( kgf mm⁻² ) 1100-1300
Shear strength( MPa ) 180-250
Pultrusions
Element Value
Compressive strength( MPa ) 1550-1850

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