Boron Nitride (BN)


Boron Nitride has high thermal conductivity, low thermal expansion, and good thermal shock resistance. Some applications include microwave components, electronic parts, semiconductor, prototypes, high temperature furnace fixtures, and supports.

Material Specifications
Physical Properties Units Test Grade A Grade AX05 Grade HP
Chemical Formula   - 95% BN 99% BN 95% BN
Density g/cm³ ASTM C20 >1.90 >1.80 >1.90
Color - - white white white
Crystal Structure - - hexagonal hexagonal hexagonal
Water Absorption % ASTM C373 - - -
Hardness Moh's - 5 2 4
Hardness Knoop
(kg/mm1)		 Knoop 100g 15.51 - 24.19
Knoop(kg/mm2)		 - -
Mechanical Properties Units Test Grade A Grade AX05 Grade HP
Compressive Strength psi
MPa		 ASTM C773 20780 (27060)
@25°C		 125 25
Tensile Strength psi
MPa		 ACMA TEST# 4 - - -
Modulus of Elasticity
(Young's Mod.) 		psi x 106
GPa		 ASTM C848 - 17 - 71 40 - 60
Flexural Strength psi
MPa		 ASTM F417 11000 (16400) @
25°C 900 (1380)
@1500°C		 2600 (3100)
@ 25°C 6200
(11000) @ 1500 °C		 6430 (8730)
@ 25°C 1710
(2470) @ 1500 °C
Poisson's Ratio - ASTM C818 - - -
Fracture Toughness MPa x m1/2 Notched Beam - - -
Thermal Properties Units Test Grade A Grade AX05 Grade HP
Max. Use Temperature
(* denotes insert atm.) 		°C No Load Cond. >1000 >1800 >1000
Thermal Shock Resistance DT (ºC) Quenching -    
Thermal Conductivity W/m.K ASTM C408 30 70 - 130 30
Coefficient of Linear
Thermal Expansion 		µm/m-°C
(~25°C though +/- 1000°C)		 ASTM C372 2 0 0
Specific Heat cal/g/°C ASTM C351 1.610 @ 700°C
(J/g°C)		 - -
Electrical Properties Units Test Grade A Grade AX05 Grade HP
Dielectric Constant 1Mhz @ R.T. ASTM D150 4.0 4.0 4.0
Dielectric Strength V/mil
kV/mm		 ASTM D116 >40 >40 >40
Electrical Resistivity Wcm @ R.T. ASTM D182 >1014 >1014 >1014

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