Green Silicon Carbide (GSIC) is produced in an electric resistance furnace from quartz sand, petroleum coke and salt at high temperature. GSIC semi-transparent in green color with friability, high purity and high hardness. It's suited for grinding hard, brittle and non-metallic such as cemented carbides, optical glass, ceramics, precise instrument, etc.
Crystal Form |
Alpha SiC hexagonal system |
||||||||
Chemical nature |
Slight acid |
||||||||
Reaction with acids |
Very slight surface action with hydrofluoric acid |
||||||||
Reaction with Alkalies |
Attcked at high temperature by alkalles and iron xide |
||||||||
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 |
2300oC |
||||||||
Max Usable temperature |
1540oC in air |
||||||||
Specific heat (cal/g.oC ) |
0oC |
500oC |
1000oC |
||||||
0.14 |
0.28 |
0.13 |
|||||||
Coefficient of thermal conductivity |
600oC |
800oC |
1000oC |
||||||
0.080 |
0.061 |
0.051 |
|||||||
Electrical resistivity (Wcm) |
25oC |
100oC |
400oC |
800oC |
1400oC |
||||
50 |
46.4 |
26.6 |
7.8 |
0.65 |
|||||
Coefficient of liner |
25oC-500oC |
25oC -1000oC |
25oC -1500oC |
25oC-2000oC |
25oC-2500oC |
||||
4.63 |
5.12 |
5.48 |
5.77 |
5.94 |
Chemical Composition (% by weight) | ||||||
Grit |
20# - 90# |
100# - 180# |
220# - 240# |
280# - 400# |
500# -600# |
|
SiC Min |
99.0 |
98.0 |
97.5 |
97.0 |
95.5 |
94.0 |
F.C Max |
0.20 |
0.25 |
0.25 |
0.30 |
0.30 |
0.50 |
Fe2O3 Max |
0.20 |
0.50 |
0.70 |
0.70 |
0.70 |
0.70 |
Magnetic Material Content (% by weight | |
Grit |
Magnetic material Content |
16#-30# |
<0.0180 |
36#-60# |
<0.0150 |
70#-120# |
<0.0120 |
150#-220# |
<0.0100 |
Available grain sizes | |||||
Grit No. |
Micron |
Grit No. |
Micron |
Grit No. |
Micron |
10 |
2360 ~ 2000 |
30 |
710 ~ 600 |
80 |
212 ~ 180 |
12 |
2000 ~ 1700 |
36 |
600 ~ 500 |
90 |
180 ~ 150 |
14 |
1700 ~ 1400 |
40 |
500 ~ 425 |
100 |
150 ~ 125 |
16 |
1400 ~ 1180 |
46 |
425 ~ 355 |
120 |
125 ~ 106 |
20 |
1180 ~ 1000 |
54 |
355 ~ 300 |
150 |
106 ~ 75 |
22 |
1000 ~ 850 |
60 |
300 ~ 250 |
180 |
90 ~ 63 |
24 |
850 ~ 710 |
70 |
250 ~ 212 |
220 |
75 ~ 53 |
Available mircron powder sizes | ||||||
China GB 2477-83 |
JIS |
FEPA(84) / DIN(70) |
||||
Grit No. |
Norminal size range(µm) |
Grit No. |
ds50 value (µm) |
Grit No. |
ds50 value (µm) |
|
Standard werte der Mikro-F-Reihe |
Sedigraph 5000D |
|||||
|
|
240 |
60.0±4.0 |
|
|
|
|
|
280 |
52.0±3.0 |
|
|
|
W63 |
63 - 50 |
320 |
46.0±2.5 |
F230/53 |
53±3.0 |
50.0±3.0 |
W50 |
50 - 40 |
360 |
40.0±2.0 |
F240/45 |
44.5±2.0 |
42.0±2.0 |
|
|
400 |
34.0±2.0 |
|
|
|
W40 |
40 - 28 |
500 |
28.0±2.0 |
F280/37 |
36.5±1.5 |
34.5±1.5 |
|
|
600 |
24.0±1.5 |
F320/29 |
29.2±1.5 |
27.7±1.5 |
W28 |
38 - 20 |
700 |
21.0±1.3 |
F360/23 |
22.8±1.5 |
21.6±1.5 |
|
|
800 |
18.0±1.0 |
F400/17 |
17.3±1.0 |
16.5±1.0 |
W20 |
20 - 14 |
1000 |
15.5±1.0 |
F500/13 |
12.8±1.0 |
12.3±1.0 |
W14 |
14 - 10 |
1200 |
13.0±1.0 |
|
|
|
|
|
1500 |
10.5±1.0 |
F600/9 |
9.3±1.0 |
9.0±1.0 |
W10 |
10 - 7 |
2000 |
8.5±0.7 |
|
|
|
W7 |
7 - 5 |
2500 |
7.0±0.7 |
F800/7 |
6.5±1.0 |
6.3±1.0 |
W5 |
5 - 3.5 |
3000 |
5.7±0.5 |
F1000/5 |
4.5±0.8 |
4.5±0.8 |
|
|
|
|
F1200/3 |
3.1±0.5 |
3.1±0.5 |
for general purposes |
for general purposes |
for bonded abrasives |
Application |
|
Grinding wheels |
Electrical |
Coated tools |
Heating elements |
Polishing |
Ceramic |
Lapping |
Refractory |