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Grade: Pyrolitic
Formula: BN
Form: Foil/Film/Sheet
Material: Boron Nitride
CAS Number: 10043-11-5
Commodity: Ceramics
Thickness: 1mm

Pyrolitic Boron Nitride Sheet

Pyrolitic Boron Nitride Sheet is a ceramic material synthesized by chemical vapor deposition, producing a highly pure, anisotropic structure with excellent thermal conductivity in-plane and electrical insulation out-of-plane. In sheet form, it provides machinable, stable substrates with low thermal expansion. Industries such as electronics, aerospace, and high-temperature processing employ pyrolitic BN sheets for insulators, crucibles, and diffusion barriers. Specific applications include substrates for high-power semiconductor devices, non-wetting crucibles for molten metals, and thermal management layers in vacuum furnaces. In research, these sheets are studied for anisotropic heat conduction, stability under plasma exposure, and role in advanced composites. Their unique combination of thermal conductivity, chemical inertness, and electrical insulation ensures pyrolitic BN sheets remain vital in high-performance thermal management and electronic insulation systems.
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Tolerances

Foil/Film/Sheet
Thickness ±20%

Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Fair
Acids - dilute Fair
Alkalis Fair
Halogens Poor
Metals Good
Electrical Properties
Element Value
Dielectric constant 4.3
Dielectric strength( kV mm⁻¹ ) 40-200
Volume resistivity( Ohmcm ) 10¹¹-10¹⁴@25
Physical Properties
Element Value
Apparent porosity( % ) Feb-15
Density( gcm⁻³ ) 1.9-2.2
Thermal Properties
Element Value
Sublimation point( C ) 2600-2800
Upper continuous use temperature( C ) 950-2500
Specific heat( J K⁻¹ kg⁻¹ ) 800-2000@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 15-50@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 1-36@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 20-35
Shear strength( MPa ) Dec-25
Pultrusions
Element Value
Compressive strength( MPa ) 30-120

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