Boron Nitride Ceramic (BN) Parts

High-temperature ceramic with excellent thermal stability,

electrical insulation, and machinability for demanding

industrial applications.

What Is Boron Nitride Ceramic?

Boron nitride ceramic (BN) is an advanced engineering ceramic known for its excellent thermal stability, outstanding electrical insulation, and superior machinability.

Unlike many structural ceramics, boron nitride can be easily machined into complex shapes while maintaining strong performance in high-temperature environments. It also exhibits excellent chemical stability and low wettability to molten metals.

Boron nitride ceramics are widely used in high-temperature furnaces, metal casting processes, semiconductor manufacturing, and electrical insulation systems, where reliability and thermal stability are critical.

Key Features of Boron Nitride Ceramic

Excellent High-Temperature Stability
Boron nitride can operate at very high temperatures in inert atmospheres while maintaining structural stability.
Outstanding Electrical Insulation
BN ceramics provide excellent electrical insulation even at elevated temperatures.
Excellent Machinability
Unlike most advanced ceramics, boron nitride can be easily machined using conventional tools.
Low Thermal Expansion
The material exhibits low thermal expansion, allowing stable performance under temperature changes.
Good Thermal Conductivity
BN ceramics offer good thermal conductivity, making them suitable for thermal management applications.
Non-Wetting to Molten Metals
Boron nitride has excellent resistance to molten metals, making it ideal for metal casting and processing applications.

Technical Properties Boron Nitride Ceramic

The following table summarizes the typical physical, mechanical, thermal, and electrical properties of boron nitride ceramic (BN). These values are provided for reference and may vary depending on material grade, manufacturing method, and application conditions.

Property	Unit	Typical Value	Notes
Material Name	—	Boron Nitride Ceramic	BN Ceramic
Material Type	—	Non-oxide ceramic	Advanced technical ceramic
Chemical Formula	—	BN	Boron Nitride
Color	—	White / Light gray	Typical appearance
Crystal Structure	—	Hexagonal	h-BN structure
Porosity	%	<1	Dense hot-pressed ceramic
Machinability	—	Excellent	Can be machined with conventional tools

Property	Unit	Typical Value	Notes
Density	g/cm³	1.9 – 2.1	Typical value
Water Absorption	%	0	Dense material
Specific Heat	J/kg·K	~790	At 25 °C
Thermal Diffusivity	m²/s	~4 ×10⁻⁵	Typical value

Property	Unit	Typical Value	Notes
Young’s Modulus	GPa	30 – 40	Lower stiffness
Shear Modulus	GPa	~16	Typical value
Poisson’s Ratio	—	0.10	Typical value
Vickers Hardness	HV	70 – 100	Relatively soft ceramic
Flexural Strength	MPa	70 – 120	Typical value
Compressive Strength	MPa	200 – 300	Typical value
Fracture Toughness	MPa·m½	1.5 – 2	Typical value

Property	Unit	Typical Value	Notes
Maximum Continuous Operating Temperature (Air)	°C	900	Oxidation limit
Maximum Operating Temperature (Inert Atmosphere)	°C	1800 – 2000	Vacuum / inert gas
Thermal Conductivity	W/m·K	25 – 60	Depends on grade
CTE (25–1000 °C)	×10⁻⁶ /°C	1 – 2	Very low expansion
Sublimation Temperature	°C	~3000	In inert atmosphere

Property	Unit	Typical Value	Notes
Dielectric Constant (1 MHz)	—	3 – 4	Typical value
Loss Tangent	—	~0.0003	Low dielectric loss
Dielectric Strength	kV/mm	35 – 40	Typical value
Volume Resistivity	ohm·cm	≥10¹⁴	At room temperature
Electrical Insulation	—	Excellent	High resistivity

*All values shown are typical material properties and are provided for reference only. Actual values may vary depending on material grade, manufacturing process, and testing conditions.