SiC powder Green silicon carbide 63C 64C F400

Green silicon carbide powder

Green silicon carbide powder is a very hard abrasive material with uniform particle size distribution. The hardness of it only ranks after diamond and B4C, and it is harder than black silicon carbide. So it is suitable to grinding large range of hard material such as titanium alloy, marble, carbide alloy, optical glasses, ceramics, etc.

On the other hand, green silicon carbide has extraordinary features such as high chemical stability, low thermal expansion rate, it is suitable for heat resistance & corrosion resistance coatings, paints, and other construction products.

Typical physical properties of Green silicon carbide powder

Mohs Hardness:
Vickers Hardness:	3100-3400kg/mm2
Specific Gravity:	3
Bulk density(LPD):	3
Color:	Green
Particle shape:	Hexagonal
Melting Point:	Dissociated at about 2600 centigrade
Maximum service temperature:	1900 centigrade
Friability	Friable
Thermal conductivity	°C)
Thermal expansion coefficient	7-9 x10-6 /℃(0-1600°C)

Chemical analysis of Green silicon carbide powder

TYPICAL CHEMICAL ANALYSIS
Chemical Content	F20-F220	F230-F2000
SiC	Min 99%	Min 98.5%
SiO2	Max 0.50%	Max 0.70%
F,Si	Max 0.20%	Max 0.40%
Fe2O3	Max 0.10%	Max 0.15%
	Max 0.20%	Max 0.30%
	Max 0.05%	Max 0.09%

Product Feature of Green silicon carbide powder

1. Extremely high hardness (Mohs 9.5, Vickers 3100-3400kg/mm2) with high wear-resistance ability. The hardness of SiC decrease with the increasing of temperature. But still, even at the temperature of 1200°C, the hardness of green SiC is about twice that of fused alumina’s.
2. Excellent chemical resistance and oxidation resistance. When heated at high temperatures, silicon carbide only oxidizes on the surface, forming a silicon dioxide film. The film can protect the silicon carbide material from oxidation.As a result, even in 1600°C ,green SiC can maintain stability to most strong acids and alkalis.
3. High Toughness.The toughness of silicon carbide abrasive refers to the difficulty of breaking under the action of external force. Taking F46 grit as an example, the toughness of carborundum tested by static pressure method is about 68-78%.Comparing with fused alumina, the mechanical strength of silicon carbide is higher. F120 for example, the compressive strength of silicon carbide is 186KN/cm2, and the compressive strength of corundum abrasive is 100KN/cm2.
4. Excellent thermal shock resistance with low thermal expansion coefficient. At a temperature of 25-1400°C, the average thermal expansion coefficient of silicon carbide is 4.4x10-6/°C, while the thermal expansion coefficient of fused alumina is 7-8x10-6/°C.
5. High temperature resistance; high temperature strength. The melting point of green silicon carbide is 2600 °C, and the maximum operating temperature can reach 1900 °C. Applying silicon carbide to the inner wall of the engine can increase the life of the engine.
6. High purity. The green silicon carbide grain from us is milling from A grade green SiC block. Then sieve to high consistency particles.

Applications of Green silicon carbide powder

1. Precision polishing for hard optical glass such as camera lens.
2. Abrasive blasting on hard metal CNB knife such as titanium alloy, carbide alloy, etc.
3. Polishing and grinding quartz glass.
4. Grinding hard stone, marbles, granite, etc.
5. Polishing PZT/Piezoelectric ceramic.
6. Blasting copper and copper alloy.
7. Surface treatment on diamond tools.
8. Wire sawing.
9. Polishing jewelry such as diamond and cinnabar.
10. Grinding other thin brittle material precise component.
11. Anti-fire novel Nano Aerogel.
12. Fire insulation material such as sintered ceramics.
13. Teflon coating.
14. Fluorocarbon coating and paint.
15. High quality brake additives such as aero plane brakes.
16. Silicon carbide ceramic filler.
17. Polishing tools such as wet diamond polishing pad, PVC grinding disc, etc.

Specification of Green silicon carbide powder

JIS Grit Size	D0(Micron)	D3(Micron)	D50(Micron)	D94(Micron)
#240	≤ 127	≤ 103		≥ 40
#280	≤ 112	≤ 87		≥ 33
#320	≤ 98	≤ 74		≥ 27
#360	≤ 86	≤ 66		≥ 23
#400	≤ 75	≤ 58		≥ 20
#500	≤ 63	≤ 50		≥ 16
#600	≤ 53	≤ 41		≥ 13
#700	≤ 45	≤ 37		≥ 11
#800	≤ 38	≤ 31		≥ 9.0
#1000	≤ 32	≤ 27		≥ 7.0
#1200	≤ 27	≤ 23		≥ 5.5
#1500	≤ 23	≤ 20		≥ 4.5
#2000	≤ 19	≤ 17		≥ 4.0
#2500	≤ 16	≤ 14		≥ 3.0
#3000	≤ 13	≤ 11		≥ 2.0
#4000	≤ 11	≤ 8.0		≥ 1.8
#6000	≤ 8.0	≤ 5.0		≥ 0.8
#8000	≤ 6.0	≤ 3.5		≥ 0.6

FEPA standard:

Grit Size	D3(um)	D50(um)	D94（um)
F230	<82		>34
F240	<70		>28
F280	<59		>22
F320	<49		>16.5
F360	<40		>12
F400	<32		>8
F500	<25		>5
F600	<19		>3
F800	<14		>2
F1000	<10		>1
F1200	<7		>1(at 80%)
F1500	<5		>0.8(at 80%)
F2000	<3.5		>0.5(at 80%)

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