Boron Nitride
Material properties Norm Symbol / Unit MYCROSINT®
HD
MYCROSINT®
S
MYCROSINT®
CD
Crystalline phases hex. BN hex. BN hex. BN
Binder phase / Binder type <1%B2O3 4%B2O3 B2O3 + CaO
Orientation dependency Isotropic Anisotropic Anisotropic
II II
Density (typical) DIN EN 623-2 ρ [g/cm3] 1.96 2.07 2.07 1.97 1.97
Total porosity (calculated using theoretical density) DIN EN 623-2 P [%] <13 <7 <7 <12 <12
Brinell hardness DIN EN
ISO 6506-1
HBW
2.5/31.25
10 30 30 13 13
Young’s modulus DIN EN 843-2 E [GPa] 23 35 30 30 25
Flexural strength DIN EN 843-1 σB [MPa] 19 95 85 40 35
Weibull modulus DIN EN 843-1
Compressive strength AAW/
AC-R-302-03
σD [MPa] 36 105 125 50 55
Coefficient of thermal expansion DIN EN 821-1 Thermal expansion behavior: nonlinear, residual elonation after cooling; CTE given indication only
20°C - 500°C α [10-6/K] -1 1 2 -1 -1
500°C - 1000°C α [10-6/K] 0.5 1 2 1.5 2
1000°C - 1500°C α [10-6/K] 2.5 1 5 3 4
Specific heat at 20°C DIN EN 821-3 Cp [J/gK] 0.61 0.6 0.6 0.58 0.58
Thermal conductivity at 20°C DIN EN 821-2 λ [W/mK] 25 40 25 35 35
Maximum temperature of use (oxidizing/inert atmosphere) [°C] 900/1800 1000/
1500
1000/
1500
1100/
1500
1100/
1500
Specific electrical resistance at 20°C DIN EN 50359 ρ [Ωcm] >1012 >1012 >1012 >1012 >1012



Boron Nitride
Material properties Norm Symbol / Unit MYCROSINT®
SO20
MYCROSINT®
SO43
MYCROSINT®
O40
Crystalline phases BN+ZrO2+SiC BN+ZrO2+SiC BN+ZrO2
Binder phase / Binder type 2%B2O3
Orientation dependency Anisotropic Anisotropic Anisotropic
II II II
Density (typical) DIN EN 623-2 ρ [g/cm3] 2.3 2.3 2.92 2.92 2.82 2.82
Total porosity (calculated using theoretical density) DIN EN 623-2 P [%] 10 10 <6 <6 <6 <6
Brinell hardness DIN EN
ISO 6506-1
HBW
2.5/31.25
30 30 85 85 63 63
Young’s modulus DIN EN 843-2 E [GPa] 35 20 45 30 45 25
Flexural strength DIN EN 843-1 σB [MPa] 70 40 120 80 120 80
Weibull modulus DIN EN 843-1
Compressive strength AAW/
AC-R-302-03
σD [MPa] 85 100 175 175 185 185
Coefficient of thermal expansion DIN EN 821-1 Thermal expansion behavior: nonlinear, residual elonation after cooling; CTE given indication only
20°C - 500°C α [10-6/K] 0.5 4.6 2 8 2 6
500°C - 1000°C α [10-6/K] 1.9 6.6 4 9 3.5 9
1000°C - 1500°C α [10-6/K] 0.5 2.2 1.4 4.5 1.5 8
Specific heat at 20°C DIN EN 821-3 Cp [J/gK] 0.6 0.6 0.5 0.5 0.5 0.5
Thermal conductivity at 20°C DIN EN 821-2 λ [W/mK] 45 25 40 30 30 20
Maximum temperature of use (oxidizing/inert atmosphere) [°C] 1100/
1800
1100/
1800
1100/
1800
1100/
1800
1100/
1800
1100/
1800
Specific electrical resistance at 20°C DIN EN 50359 ρ [Ωcm] >1012 >1012 >1012 >1012 >1012 >1012