Green Silicon Carbide is produced in electric resistance furnace from quartz sand, petroleum coke and salt in high temperature. It's semi-transparent in green color with crystal structure, high hardness and strong cutting ability, stable chemical characteristics, good thermal conductivity. It's suited for grinding hard, brittle and non-metallic such as cemented carbides, optical glass, ceramics, etc.
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) |
2500-2900 | ||||
Moh's |
9.5 | |||||
Color |
Green | |||||
Color after firing |
Green | |||||
Decomposition point |
2300°C | |||||
Max Usable temperature |
1540°C in air | |||||
Specific heat (cal/g.oC ) |
0°C |
500°C |
1000°C | |||
0.14 |
0.28 |
0.13 | ||||
Coefficient of thermal conductivity (cal/cm2.sec.oC) |
600°C |
800oC |
1000°C | |||
0.080 |
0.061 |
0.051 | ||||
Electrical resistivity(Wcm) |
25°C |
100°C |
400°C |
800°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 |
Chemical Composition (% by weight)
Grit sizes |
SiC |
F.C |
Fe2O3 |
20# - 90# |
99.0 min |
0.20 max |
0.20 max |
100# - 180# |
98.5 min |
0.25 max |
0.50 max |
220# - 240# |
97.5 min |
0.25 max |
0.70 max |
280# - 400# |
97.0 min |
0.30 max |
0.70 max |
500# - 600# |
95.5 min |
0.30 max |
0.70 max |
800# - 1200# |
94.0 min |
0.30 max |
0.70 max |
Magnetic Material Content (% by weight)
Grit |
Magnetic material Content |
16#-30# |
<0.018 |
36#-60# |
<0.015 |
70#-120# |
<0.012 |
150#-220# |
<0.010 |
Applications
Grinding wheels |
Heating elements |
Coated tools |
Refractory |
Polishing |
Electrical |
Lapping |
Ceramic |
Available Sizes: F10-F220, F230-1200, W63-W5, JIS240-JIS3000. Other sizes can be also available according to customers' requirements.
Packing way: 25kgs/bag or by customer's request.