Black silicon carbide is produced at high temperature in an electric resistance type furnace with quarts sand and petroleum coke as its main raw marterials .Its hardness is between fused alumina and synthetic diamond.Mechanical intensity of it is higher than fused alumina .It is brittle and sharp has electrical and heat conductivity in some degree.
1. Chemical analysis
|
Purpose
|
Specification
|
Chemical Composition(%)
|
Magnetic material content(%)max
|
|||
|
Abrasives grade
|
SICmin
|
F.Cmax
|
Fe2O3max
|
|||
|
grain
|
12-80
|
98
|
0.20
|
0.6
|
0.0023
|
|
|
90-150
|
97
|
0.30
|
0.8
|
0.0021
|
||
|
180-220
|
97
|
0.30
|
1.2
|
0.0018
|
||
|
micropowder
|
240-4000
|
96
|
0.35
|
1.35
|
—
|
|
|
Refractory grade
|
Group Size
|
0-1mm
1-3mm
3-5mm
5-8mm
|
97
|
0.35
|
1.35
|
—
|
|
Fine Powder
|
-180mesh
-200mesh
-240mesh
-320mesh
|
97
|
0.35
|
1.35
|
—
|
|
2. Physical analysis
|
color
|
Black
|
|
Hardness(mohs)
|
9.15
|
|
Melting point(°C)
|
2250
|
|
Maximum service temperature(°C)
|
1900
|
|
Ture density(g/cm3)
|
3.9
|
3. Application
1) Black silicon carbide can be made of abrasives , which are suitable for working on cast iron, non-ferrous metal , rock. leather,rubber,ect.
2) I t can be broadly used as refractory materials and metallurgical additive.