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Momentive Performance Materials Boralloy® PBN Pyrolytic Boron Nitride

Category Ceramic , Nitride
Manufacturer Momentive Performance Materials (Former GE Advanced Ceramics)
Trade Name Boralloy®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Momentive Performance Materials Boralloy® PBN Pyrolytic Boron Nitride.pdf
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Material Notes:
Boralloy® Pyrolytic Boron Nitride (PBN) is an anisotropic, high-temperature ceramic which exhibits a unique combination of high electrical resistance and good thermal conductivity. This non-toxic, non-porous compound is exceptionally pure by virtue of the synthesis process (high temperature/low pressure chemical vapor deposition). It can be deposited or easily machined into a limitless number of shapes, including: crucibles, tubes, machined plate products, boats, and bottles. PBN's directional thermal conductivity provides excellent "heat spreading" capability for improved temperature uniformity. The combination of high strength, good thermal conductivity, and a low coefficient of thermal expansion make the material extremely resistant to thermal shock. PBN has found wide acceptance in the semiconductor, electronics, metallurgical, thin film, and pharmaceutical industries.Information provided by Momentive Performance Materials, formerly GE Advanced Ceramics.
Physical Properties Metric English Comments
Density 1.95 - 2.22 g/cc
0.0704 - 0.0802 lb/in³
Apparent Density
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 40.0 MPa

@Temperature 23.0 °C
5800 psi

@Temperature 73.4 °F
103 MPa

@Temperature 2200 °C
14900 psi

@Temperature 3990 °F
Modulus of Elasticity 22.0 GPa
3190 ksi
Young's modulus
Flexural Strength 80.0 MPa
11600 psi
Compressive Strength 234 MPa
33900 psi
Poissons Ratio 0.25
0.25
Shear Modulus 8.80 GPa
1280 ksi
Calculated
Thermal Properties Metric English Comments
CTE, linear -2.00 µm/m-°C

@Temperature 0.000 - 250 °C
-1.11 µin/in-°F

@Temperature 32.0 - 482 °F
average, in "a" direction
2.00 µm/m-°C

@Temperature 1000 °C
1.11 µin/in-°F

@Temperature 1830 °F
"ab" direction
40.0 µm/m-°C

@Temperature 0.000 - 250 °C
22.2 µin/in-°F

@Temperature 32.0 - 482 °F
average, in "c" direction
Thermal Conductivity 2.00 W/m-K
13.9 BTU-in/hr-ft²-°F
in "c" direction
60.0 W/m-K
416 BTU-in/hr-ft²-°F
in "ab" direction
Maximum Service Temperature, Air 750 °C
1380 °F
indefinite exposure to oxygen
Maximum Service Temperature, Inert 2500 °C
4530 °F
Optical Properties Metric English Comments
Emissivity (0-1) 0.50

@Temperature 1300 °C
0.50

@Temperature 2370 °F
lower than graphite
Electrical Properties Metric English Comments
Electrical Resistivity 1.00e+15 ohm-cm
1.00e+15 ohm-cm
Dielectric Constant 3.4
3.4
"c" direction
5.2
5.2
"ab" direction
Dielectric Strength 200 kV/mm
5080 kV/in
D.C.
Dissipation Factor 0.0020

@Frequency 4.00e+9 Hz
0.0020

@Frequency 4.00e+9 Hz
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