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Description

Pyrolytic Boron Nitride (PBN) is an extremely pure boron nitride solid grown using a CVD process.


PBN is suitable for the most demanding applications requiring high-temperature and high-purity. Crystal structure of this non-toxic ceramic is such that it exhibits a high degree of thermal anisotropy favourable for crystal growth and other applications.

Properties

Electrical

Electrical resistivity ρel

1.00E+13 Ω·m at 25 °C

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Electrical resistivity, transverse ρel,trans

1.00E+13 Ω·m at 25 °C

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General

Density ρ

1.95 - 2.19 g/cm³ at 20 °C

Permeability coefficient cperm

2E-11 cm²/s at 20 °C

helium

Mechanical

Compressive strength Rmc

255 MPa at 25 °C

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Compressive strength, transverse Rs,trans

331 MPa at 25 °C

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Elastic modulus E

221 GPa at 25 °C

Flexural modulus Ebend

221 GPa at 25 °C

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Poisson's ratio ν

0.09 [-] at 20 °C

Tensile strength Rm

145 MPa at 25 °C

Thermal

Coefficient of thermal expansion α

3E-5 1/K at 20 °C

Coefficient of thermal expansion, transverse αtrans

3E-5 1/K at 20 °C

Max service temperature Tmax

900 °C

in air

Max service temperature, intermittent Tmax,inter

1900 °C

Specific heat capacity cp

837 J/(kg·K) at 20 °C

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Thermal conductivity λ

105 W/(m·K) at 25 °C

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Thermal conductivity, transverse λtrans

1.67 W/(m·K) at 25 °C

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Technological properties

Application areas

MBE crucibles, MBE furniture, electrical insulators, vacuum furnace insulation, LEC, VGF, and brindgman crucibles, crystal growth, including GaAs and InP, SUMO crucibles, heating elements, auxiliary effusion cell hardware

Processing history

CVD

This material data has been provided by Goodfellow.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.