Detailed Product Description
Black Silicon Carbide is produced in an electric resistance furnace from quartz sand and petroleum coke or anthracite at high temperature. The hardness and sharp particle shape of this material make it suitable for manufacturing of grinding wheels, coated products, wire saws, superior refractory materials and deoxideiser as well as for lapping, polishing and blasting.

Chemical & Physical Properties 

Crystal Form	Alpha SiC hexagonal system
Chemical nature	Slight acid
Reaction with acids	Very slight surface action with hydrofluoric acid
Reaction with Alkalis	Attacked at high temperature by alkalis and iron oxide
Oxidation-reduction effects	Starts to oxide slowly at 800oC. No reduction
True Density (g/cm3)	3.20
Hardness	Knoop(kg/cm2)				2200-2500
	Moh's				9.5
Color	Black
Color after firing	Black
Decomposition point	2200oC
Max Usable temperature	1540oC in air
Specific heat (cal/g.oC)	0oC			500oC	1000oC
	0.14			0.28	0.13
Coefficient of thermal conductivity (cal/cm2.sec.oC)	600oC			800oC	1000oC
	0.080			0.061	0.0510
Electrical resistivity ( Wcm)	25oC	100oC	400oC	800oC	1400oC
	50	46.4	26.6	7.8	0.65
Coefficient of liner expansion (x10-6)	25oC-500oC	25oC-1000oC	25oC-1500oC	25oC-2000oC	25oC-2500oC
	4.63	5.12	5.48	5.77	5.94