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Boron Nitride Grade XP

Grade XP boron nitride is a grade of hexagonal boron nitride. The graph bars on the material properties cards below compare grade XP boron nitride to other non-oxide engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Thermal Properties

Maximum Temperature: Corrosion

2800 °C 5070 °F

Maximum Temperature: Mechanical

1750 °C 3180 °F

Specific Heat Capacity

1470 J/kg-K 0.35 BTU/lb-°F

Thermal Conductivity

96 W/m-K 56 BTU/h-ft-°F

Thermal Expansion

0.54 µm/m-K

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

80 kV/mm 3.1 V/mil

Electrical Dissipation At 1 Hz


Electrical Dissipation At 1 MHz


Electrical Resistivity Order of Magnitude

13 10x Ω-m

Other Material Properties

Compressive (Crushing) Strength

21 MPa 3.0 x 103 psi


1.9 g/cm3 120 lb/ft3

Elastic (Young's, Tensile) Modulus

14 GPa 2.0 x 106 psi

Flexural Strength

18 MPa 2.5 x 103 psi

Poisson's Ratio


Common Calculations

Stiffness to Weight: Axial

4.1 points

Stiffness to Weight: Bending

42 points

Thermal Diffusivity

34 mm2/s

Followup Questions

Further Reading

Handbook of Refractory Carbides and Nitrides: Properties, Characteristics, Processing and Applications, Hugh O. Pierson, 1996

Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012

IEC 60672-3: Ceramic and glass-insulating materials - Part 3: Specifications for individual materials

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005

Sintering of Advanced Materials: Fundamentals and Processes, Zhigang Zak Fang (editor), 2010