Boron Carbide Powder for Nuclear Applications

Boron is an important material for nuclear applications due to its high neutron absorption cross section (760 barn* at neutron velocity of 2200 m/sec). The cross section of the B10 isotope in boron is considerably higher (3800 barn). In addition, boron doesn’t contain decay products with a long half-life and high-energy secondary radioactive materials. Since pure boron is extremely brittle and difficult to produce in shapes (for example: control rods) boron carbide is the material of choice to use since it provides a high concentration of boron atoms in a strong and refractory form and is relatively easy to fabricate.

Technical data
• Appearance (dry state):ColorBlack
• Chemical composition:Chemical formula:B4C Application
 GradeNG (Nuclear)
 B + C min.98
 B (Boron) min.76
  C (Carbon) max. 24
  Fe(Iron) max. 0.1
  Si(Silicon) 0.01
 N (Nitrogen) 0.5
 Isotope B10 (atomic weight) 19.5-21.5%
•Physical data:Knoop hardness(0.1)3000
 Mohs hardness <9.5
 Specific gravity:2.51
 Melting point:2723 °F

Note:1.Diamond’s Mohs hardness is 10.
2.*Barn is unit of area equal to 10-24 sq. centimeters, used to measure cross sections in nuclear physics

Particle Size
Typical ApplicationNotes Notes Notes
1.NG112M112 micron Additive to concrete B <75%
2.NG36L36 micronB <70%
3.NG24H24 micronNuclear Shielding Panels,
Reaction Control Rods,
5.NG100H100 micronB >76%
6.NG100HE100 micronB >76% + Enhanced Heat Transfer
7.NG6H6 micronB >76%
8. NG6HE 6 micronB >76% + Enhanced Heat Transfer

Note:1. Custom products are available on request.
2.Standard packaging in 100 lb (30 gal.) fiber drums. Custom packaging is available on request.

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