Boron Nitride Rod

Boron Nitride Rod stands out for its excellent thermal conductivity, chemical inertness, and exceptional electrical insulation. Boron Nitride (BN) offers a wide bandgap (~5.9 eV), high thermal stability, and resistance to oxidation and chemical attack. It is extensively used in high-temperature and chemically aggressive environments, making it indispensable in industries such as aerospace, electronics, and metallurgy. Specific applications include usage as thermal interface materials, electrically insulating components in semiconductors, and as fillers in polymer composites for heat dissipation. Boron nitride rods also find use in dielectric substrates for high-frequency electronics and as protective coatings against corrosion and wear. In scientific research, their role as substrates for 2D materials and their neutron absorption capacity make them vital in advanced device fabrication and radiation shielding. Their combination of thermal, mechanical, and electrical properties underpins their industrial and scientific value, enabling next-generation thermal management systems and high-performance electronics.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Rod

Diameter		+20% / -10%

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( % )	2-15
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