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
4.0
Dielectric Strength (Breakdown Potential)
80 kV/mm 3.1 V/mil
Electrical Dissipation At 1 Hz
0.0017
Electrical Dissipation At 1 MHz
0.00075
Electrical Resistivity Order of Magnitude
13 10x Ω-m
Other Material Properties
Compressive (Crushing) Strength
21 MPa 3.0 x 103 psi
Density
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
0.11
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