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Green Silicon Carbide
Green Silicon Carbide is produced in an electric resistance furnace from quartz sand, petroleum coke and salt at high temperature. It's semi-transparet 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, 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 Alkalies
Attcked at high temperature by alkalles and iron xide
Oxidation-reduction effects
Starts to oxide slowly at 800¡ãC. 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
(cal/cm2.sec.oC )
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
expansion (x10-6)
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#

800# - 1200#
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¡À4.0
¡¡
¡¡
¡¡
¡¡
¡¡¡¡
280
52.0¡À3.0
¡¡
¡¡
¡¡
W63
63 - 50
320
46.0¡À2.5
F230/53
53¡À3.0
50.0¡À3.0
W50
50 - 40
360
40.0¡À2.0
F240/45
44.5¡À2.0
42.0¡À2.0
¡¡
¡¡
400
34.0¡À2.0
¡¡
¡¡
¡¡
W40
40 - 28
500
28.0¡À2.0
F280/37
36.5¡À1.5
34.5¡À1.5
¡¡
¡¡
600
24.0¡À1.5
F320/29
29.2¡À1.5
27.7¡À1.5
W28
38 - 20
700
21.0¡À1.3
F360/23
22.8¡À1.5
21.6¡À1.5
¡¡
¡¡
800
18.0¡À1.0
F400/17
17.3¡À1.0
16.5¡À1.0
W20
20 - 14
1000
15.5¡À1.0
F500/13
12.8¡À1.0
12.3¡À1.0
W14
14 - 10
1200
13.0¡À1.0
¡¡
¡¡
¡¡
¡¡
¡¡
1500
10.5¡À1.0
F600/9
9.3¡À1.0
9.0¡À1.0
W10
10 - 7
2000
8.5¡À0.7
¡¡
¡¡
¡¡
W7
7 - 5
2500
7.0¡À0.7
F800/7
6.5¡À1.0
6.3¡À1.0
W5
5 - 3.5
3000
5.7¡À0.5
F1000/5
4.5¡À0.8
4.5¡À0.8
¡¡
¡¡
¡¡
¡¡
F1200/3
3.1¡À0.5
3.1¡À0.5
for general purposes
for general purposes
for bonded abrasives
 
Application  
Grinding wheels       
Electrical            
Coated tools           
Heating elements      
Polishing             
Ceramic                             
Lapping              
Refractory          
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