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Arabic Black Silicon Carbide (SiC) is an extremely hard (Mohs 9.1/ 2550 Knoop) man made mineral that possesses high thermal conductivity and high strength at elevated temperatures (at 1000°C, SiC is 7.5 times stronger than Al203 ). SiC has a modulus of elasticity of 410 GPa, with no decrease in strength up to 1600°C, and it does not melt at normal pressures but instead dissociates at 2600°C.
|
Type
|
Chemical Composition
|
|
|
SiC
|
F.C
|
|
|
≥
|
≤
|
|
|
SiC98.5
|
98.5
|
0.2
|
|
SiC98
|
98
|
0.3
|
|
SiC97
|
97
|
0.3
|
|
SiC95
|
95
|
0.4
|
|
SiC90
|
90
|
0.6
|
|
SiC70
|
70
|
3
|
|
SiC65
|
65
|
5
|
|
SiC60
|
60
|
10
|
|
SiC55
|
55
|
10
|
|
SiC45
|
45
|
12
|
