Welcome to Dragon Abrasives Group Limited
Tel: +86-22-87899539
Product Categories
Contact Us

Dragon Abrasives Group Limited

Add: 265# Anshanxi Street, Core Mall Times International Department, Nankai District, Tianjin, 300192 China

Fax: +86-22-87899537

Mob: +8613622002228

Tel: +86-22-87899539

E-mail: info@abrasives.asia

Web: http://www.abrasivesasia.com

Green Silicon Carbide for Bonded and Coated Abrasives

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...


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
     (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±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

Related Products

Dragon Abrasives Group Limited