HENAN BOLLY TRADING CO., LTD
Address:NO.126 HUAYUAN RD. ZHENGZHOU CHINA
TEL : +86-371-60229777
FAX: +86-371-60229888
Email:info@lianxingabrasives.com
PC:450000
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 of this material make it suitable for manufacturing of grinding wheels, coated products, wire saws, superior refractory materials and deoxide 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 800°C. No reduction
True Density (g/cm3)
3.20
Hardness
Knoop(kg/cm2)
2200-2500
Moh's
9.5
Color
Black
Color after firing
Decomposition point
2200°C
Max Usable temperature
1540oC in air
Specific heat (cal/g.°C)
0°C
500°C
1000°C
0.14
0.28
0.13
Coefficient of thermal conductivity (cal/cm2.sec.°C)
600°C
800°C
0.080
0.061
0.0510
Electrical resistivity ( Wcm)
25°C
100°C
400°C
1400°C
50
46.4
26.6
7.8
0.65
Coefficient of liner expansion (x10-6)
25°C-500°C
25°C-1000°C
25°C-1500°C
25°C-2000°C
25°C-2500°C
4.63
5.12
5.48
5.77
5.94
Grit sizes
SiC
F.C
Fe2O3
12# - 90#
98.5 min
0.20 max
0.60 max
100# - 180#
98.0 min
0.30 max
0.80 max
220# - 240#
97.0 min
1.20 max