Boron, B

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

Metal; Nonferrous Metal; Pure Element

Vendors:

Click here to view all available suppliers for this material.

Please click here if you are a supplier and would like information on how to add your listing to this material.

Printer friendly version

Download as PDF

Download to Excel (requires Excel and Windows)

Export data to your CAD/FEA program

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Physical Properties	Metric	English	Comments

Density	2.60 g/cc	0.0939 lb/in³
a Lattice Constant	4.91 Å	4.91 Å
c Lattice Constant	12.6 Å	12.6 Å

Chemical Properties	Metric	English	Comments
Atomic Mass	10.811	10.811	1995
Atomic Number	5	5
X-ray Absorption Edge	66.289 Å	66.289 Å	K
Electronegativity	2.04	2.04	Pauling
Ionic Radius	0.230 Å	0.230 Å	Crystal Ionic Radius for Valence +3
	0.350 Å	0.350 Å	Crystal Ionic Radius for Valence +1

Mechanical Properties	Metric	English	Comments
Knoop Microhardness	3300	3300
Hardness, Mohs	9.5	9.5
Tensile Strength, Ultimate	1.60 - 2.40 MPa	232 - 348 psi	Amorphous
	2.60 - 3.10 MPa	377 - 450 psi	Crystalline
Tensile Modulus	0.440 GPa	63.8 ksi
Compressive Strength	<= 0.500 MPa	<= 72.5 psi	B₂O₃ inclusions

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00200 ohm-cm @Temperature 600 °C	0.00200 ohm-cm @Temperature 1110 °F
	0.0120 ohm-cm @Temperature 520 °C	0.0120 ohm-cm @Temperature 968 °F
	0.0400 ohm-cm @Temperature 320 °C	0.0400 ohm-cm @Temperature 608 °F
	30.0 ohm-cm @Temperature 170 °C	30.0 ohm-cm @Temperature 338 °F
	400 ohm-cm @Temperature 100 °C	400 ohm-cm @Temperature 212 °F
	6500 ohm-cm @Temperature 25.0 °C	6500 ohm-cm @Temperature 77.0 °F
	30000 ohm-cm @Temperature 0.000 °C	30000 ohm-cm @Temperature 32.0 °F
	40000 ohm-cm @Temperature -10.0 °C	40000 ohm-cm @Temperature 14.0 °F
	400000 ohm-cm @Temperature -150 °C	400000 ohm-cm @Temperature -238 °F
Magnetic Susceptibility	-6.20e-7	-6.20e-7	cgs/g
Band Gap	1.55 eV	1.55 eV
Electron Mobility, cm²/V-s	10	10

Thermal Properties	Metric	English	Comments
Heat of Fusion	2050 J/g	882 BTU/lb
Heat of Vaporization	3140 J/g	1350 BTU/lb
CTE, linear	8.20 µm/m-°C @Temperature 20.0 - 100 °C	4.56 µin/in-°F @Temperature 68.0 - 212 °F
Specific Heat Capacity	0.0297 J/g-°C @Temperature -191 - -78.0 °C	0.00710 BTU/lb-°F @Temperature -312 - -108 °F
	0.754 J/g-°C @Temperature -76.0 - 0.000 °C	0.180 BTU/lb-°F @Temperature -105 - 32.0 °F
	1.285 J/g-°C @Temperature 0.000 - 100 °C	0.3071 BTU/lb-°F @Temperature 32.0 - 212 °F
	1.62 J/g-°C @Temperature 100 °C	0.387 BTU/lb-°F @Temperature 212 °F
	1.976 J/g-°C @Temperature 500 °C	0.4723 BTU/lb-°F @Temperature 932 °F
	2.135 J/g-°C @Temperature 900 °C	0.5103 BTU/lb-°F @Temperature 1650 °F
Thermal Conductivity	27.4 W/m-K	190 BTU-in/hr-ft²-°F
Melting Point	2300 °C	4170 °F
Boiling Point	4000 °C	7230 °F
Heat of Formation	397.1 kJ/mol	397.1 kJ/mol
Debye Temperature	1097 °C	2007 °F

Optical Properties	Metric	English	Comments
Refractive Index	3.40	3.40

Component Elements Properties	Metric	English	Comments
Boron, B	100 %	100 %

Descriptive Properties
CAS Number	7440-42-8

References for this datasheet.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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