Boron Carbide (B4C), also known as black diamond, is the third hardest material after diamond and cubic boron nitride. It is a suitable material for many high performance applications due to its attractive combination of properties. Its outstanding hardness makes it a suitable abrasive powder for lapping, polishing and water jet cutting of metals and ceramics.
Boron carbide is also extensively used as control rods, shielding materials and as neutron detectors in nuclear reactors due to its ability to absorb neutrons without forming long lived radionuclide. As it is a p-type semiconductor, boron carbide can be a suitable candidate material for electronic devices that can be operated at high temperatures. Boron Carbide is also an excellent p-type thermoelectric material.
Chemical composition:
| Grit Size | Mean Diameter in um | B% | C% | Fe2O3 | B4C% |
| 36# | 600-500 | 78-81 | 17-22 | 0.2-0.4 | 97-99 |
| 40# | 500-425 | 78-81 | 17-22 | 0.2-0.4 | 97-99 |
| 46# | 425-355 | 78-81 | 17-22 | 0.2-0.4 | 97-99 |
| 54# | 355-300 | 78-81 | 17-22 | 0.2-0.4 | 97-99 |
| 60# | 315-215 | 78-81 | 17-22 | 0.2-0.4 | 97-99 |
| 80# | 200-160 | 78-81 | 17-22 | 0.2-0.4 | 97-99 |
| 100# | 160-125 | 78-81 | 17-22 | 0.2-0.4 | 97-99 |
| 120# | 125-100 | 78-80 | 17-22 | 0.2-0.4 | 96-98 |
| 150# | 100-80 | 78-80 | 17-22 | 0.2-0.4 | 96-98 |
| 180# | 80-63 | 78-80 | 17-22 | 0.2-0.4 | 96-98 |
| 240# | 60-50 | 77-80 | 17-22 | 0.3-0.5 | 96-97 |
| 280# | 50-40 | 77-80 | 17-22 | 0.3-0.5 | 96-97 |
| 320# | 40-28 | 77-80 | 17-22 | 0.3-0.5 | 96-97 |
| F360/W40 | 35-28 | 76-79 | 17-21 | 0.3-0.6 | 95-97 |
| F400/W28 | 28-20 | 76-79 | 17-21 | 0.3-0.6 | 95-97 |
| F500/W20 | 20-14 | 75-79 | 17-21 | 0.4-0.8 | 94-96 |
| F600/W14 | 14-10 | 76-79 | 18-22 | 0.3-0.7 | 94-97 |
| F800/W10 | 10-7 | 74-78 | 17-21 | 0.4-0.9 | 92-94 |
| F1000/W7 | 7-5 | 74-78 | 17-21 | 0.4-0.9 | 92-94 |
| F1200/W5 | 5-3.5 | 75-78 | 18-22 | 0.1-0.8 | 90-94 |
| F1500/W3.5 | 3.5-2.5 | 75-78 | 18-22 | 0.1-0.8 | 90-94 |
| F2000/W2.5 | 2.5-1.5 | 75-78 | 18-22 | 0.1-0.8 | 90-94 |
| W1.5 | 1.5-0.5 | 75-78 | 18-22 | 0.1-0.8 | 90-94 |
| W0.5 | 0.5-0 | 75-78 | 18-22 | 0.1-0.8 | 90-94 |
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