Chemical

Composition(%)

B

75-81

C

17-22

Fe2O3

0.1-0.9

B+C

90-99

Physical

Properties

Appearance

Black powder

Molecular weight(g/mol)

55.25515

Knoop Hardness

2750

Mohs Hardness

9.3

Micro Hardness

4950kgf/mm2

Density & phase

2.52 g/cm (Solid)

Melting point

2350 °C (2623.15 K)

Solubility In InsolubleWater

Insoluble

· Abrasives for lapping and ultrasonic cutting

· Anti-oxidant in carbon-bonded refractory mixes

· Armor

· Nuclear applications such as reactor control rods and neutron absorbing shielding

· Wear parts such as blasting nozzles, wire-drawing dies, powdered metal and ceramic forming dies, thread guides