Subject: Boron Carbide Micropowder (2005-11-28 00:56:11)
Standard:
Number:
| It is smelted from boric acid and powdered carbon in electric furnace at high temperature. With the high hardness at 4950kg/cm2, it is suitable for a variety of refractory application. |
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| Color |
Shape |
True Specific Gravity |
Hardness |
Melting Temperture |
| Black |
Blocky, angular and edge sharp |
2.52 g/cm3 |
Knoop 3000, Mohs 9.5 |
2450 oC |
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| |
Typical Specification(-25 micron) |
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| Chemical |
Total B |
B2O3 |
Free B |
Compound B |
Total C |
Free C |
Compound C |
Fe2O3 |
B4C |
| 76.39% |
0.24% |
0.45% |
75.94% |
22.70% |
1.93% |
20.77% |
0.20% |
96.71% |
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| -100mesh |
-200mesh |
-325mesh |
-25 micron |
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