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Product description of Boron carbide:
Boron carbide, a black crystal powder, is one of the hardest Man-Made materials, its hardness with Mohs hardness 9.36 and microscopic hardness 5400-6300kg/mm2 is only near upon diamond, its density is 2.52g/cm3 and melting point is 2450℃,The boron carbide possesses properties of endurance hi/low temperature, no reaction with either acids or alkalis, high grinding efficiency, no magnetism. It is a good replacement of diamond.
Boron carbide also possesses the special properties of light quality, neutron absorbing, semi-conductivity, etc., so it is used for armed forces and nuclear industry.
Application of Boron carbide:
Boron carbide is widely applied as follows: boriding refractory, ion transfusion, film layer as well as grinding, polishing, drilling hard metal alloys, jewels, etc. Meanwhile, it is main material for the wear-resisting parts, precise meter-age element, precise spray nozzle, sealed washer, smelting boron steel, boron alloy, etc.
Boron carbide has showed many better properties of physics and chemistry in the hi-science/technology field.
Chart for grain size distribution and chemical composition of boron carbide CHINA GB2477-83
| Grit No. |
Basic Grain (μm) |
chemical composition | ||
| Total B(%) | Total C(%) |
Content B4C(%)
|
||
| 60# | 250 |
77-80
|
17-21 |
96-98 |
| 70# | 212 | |||
| 80# | 180 | |||
| 90# | 150 | |||
| 100# | 150 | |||
| 120# | 106 | |||
| 150# | 90-75 | |||
| 180# | 75-63 |
76-79 |
95-97
|
|
| 220# | 63-53 | |||
| F230 | 63-53 | |||
| F240 | 63-50 | |||
| F280 | 50-40 | |||
| F320 | 40-28 | |||
| F360 | 28-20 | |||
| F400 | 20-14 |
75-78 |
94-95 |
|
| F500 | 14-10 | |||
| F600 | 10-7 | |||
| F800 | 7-5 |
74-78 |
91-94
|
|
| F1000 | 5-3.5 | |||
| F1200 | 3.5-2.5 | |||
| 60#~150# | 250-75 |
76-81 |
93-97 |
|
| 46#~120# | 350-60 | |||
| -100mesh | <150 | |||
| -140mesh | <100 | |||
| -200mesh | <75 | |||
| -325mesh | <44 | |||
| -25μm | <25 | |||
| -10μm | <10 | |||