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Ensinger PEI

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Boron, B
Categories: Metal; Nonferrous Metal; Pure Element

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Physical PropertiesOriginal ValueComments
Density 2.60 g/cc
a Lattice Constant 4.91 Å
c Lattice Constant 12.6 Å
 
Chemical PropertiesOriginal ValueComments
Atomic Mass 10.8111995
Atomic Number 5
X-ray Absorption Edge 66.289 ÅK
Electronegativity 2.04Pauling
Ionic Radius 0.230 ÅCrystal Ionic Radius for Valence +3
 0.350 ÅCrystal Ionic Radius for Valence +1
 
Mechanical PropertiesOriginal ValueComments
Knoop Microhardness 3300
Hardness, Mohs 9.5
Tensile Strength, Ultimate 1.60 - 2.40 MPaAmorphous
 2.60 - 3.10 MPaCrystalline
Tensile Modulus 0.440 GPa
Compressive Strength <= 0.500 MPaB2O3 inclusions
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.00200 ohm-cm
@Temperature 600 °C
 0.0120 ohm-cm
@Temperature 520 °C
 0.0400 ohm-cm
@Temperature 320 °C
 30.0 ohm-cm
@Temperature 170 °C
 400 ohm-cm
@Temperature 100 °C
 6500 ohm-cm
@Temperature 25.0 °C
 30000 ohm-cm
@Temperature 0.000 °C
 40000 ohm-cm
@Temperature -10.0 °C
 400000 ohm-cm
@Temperature -150 °C
Magnetic Susceptibility -6.20e-7cgs/g
Band Gap 1.55 eV
Electron Mobility, cm²/V-s 10
 
Thermal PropertiesOriginal ValueComments
Heat of Fusion 2050 J/g
Heat of Vaporization 3140 J/g
CTE, linear 8.20 µm/m-°C
@Temperature 20.0 - 100 °C
Specific Heat Capacity 0.0297 J/g-°C
@Temperature -191 - -78.0 °C
 0.754 J/g-°C
@Temperature -76.0 - 0.000 °C
 1.285 J/g-°C
@Temperature 0.000 - 100 °C
 1.62 J/g-°C
@Temperature 100 °C
 1.976 J/g-°C
@Temperature 500 °C
 2.135 J/g-°C
@Temperature 900 °C
Thermal Conductivity 27.4 W/m-K
Melting Point 2300 °C
Boiling Point 4000 °C
Heat of Formation 397.1 kJ/mol
Debye Temperature 1097 °C
 
Optical PropertiesOriginal ValueComments
Refractive Index 3.40
 
Component Elements PropertiesOriginal ValueComments
Boron, B 100 %
 
Descriptive Properties
CAS Number7440-42-8

References for this datasheet.

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