Silicon Carbide

Silicon carbide is an inorganic substance with chemical formula of SiC, usually made of quartz sand, petroleum coke (or coal coke), wood chips and other raw materials in a resistance furnace at high temperature smelting. It has two basic varieties of black silicon carbide and green silicon carbide, both belonging to α-SiC. Silicon carbide has a high hardness (Mohs hardness > 9), among which, the hardness of green silicon carbide is close to diamond. High hardness and strength, as well as high temperature stability, chemical stability, low thermal expansion coefficient make silicon carbide become one of the ideal materials for grinding, cutting and polishing, widely used in non-ferrous materials grinding, hard and ductile materials finishing, ceramic parts filling and so on. In addition, because of its excellent thermal and electrical conductivity, silicon carbide is also widely used in the production of semiconductors and electronic devices. Moreover, the ideal properties also make it used in a variety of industries, such as refractory, ballistic panels and bulletproof vests and ceramic industries.

Types of Silicon Carbide

There are usually two types of silicon carbide:

• Black Silicon Carbide: Black silicon carbide contains about 95% SiC. It is sharp and fragile, also has excellent electrical and thermal conductivity, low thermal expansion rate. The abrasives made from it are very suitable for grinding cast iron and non-ferrous metals, polishing rocks, leather, rubber and so on. It is also widely used in refractory and metallurgical materials.
• Green Silicon Carbide: Green silicon carbide contains more than 97% SiC, and the purity is higher than that of black silicon carbide. It has excellent grinding and polishing properties and good self-sharpening, mostly used for processing cemented carbide, titanium alloy and optical glass, but also used for honing cylinder liner and fine grinding high-speed steel tools.

Our Products

Alfa Chemistry offers both Black Silicon Carbide (BSC) and Green Silicon Carbide (GSC) in macro and micro grit sizing. And silicon carbide is offered in standard FEPA sizes, JIS and P sizes, and custom particle sizes. Based on our long experience and industry expertise, we are pleased to offer you with high quality silicon carbide products and related services. Product details are listed in the tables below.

Black Silicon Carbide Product Code: BSC
Item	F Grit	Chemical Composition (%)			Size Distribution (%)			Bulk Density (g/cm3)	Physical Data	Typical Applications
		SiC (% min)	Fe2O3 (% max)	F.C. (% max)	D3	D50	D94
Marco Grits	F24, F30, F36, F40, F46, F54, F60, F70, F80, F90, F100, F120	98.50	0.20	0.20	-	-	-	1.43-1.58 (Depends on particle size)	Melting point (℃): 2250 Maximum service temperature (℃): 1900 Specific Gravity: 3.90g/cm3 Mohs Hardness: 9.2	Abrasives Refractory Sintered parts Ceramic wear parts Body armor Hot-pressed parts Heat transfer Lapping High temp sensors Vehicle armor
	F150, F180, F220	98.00	0.25	0.25	-	-	-	1.29-1.47 (Depends on particle size)
Micro Powder	F240	≥99	≤0.15	≤0.15	≤70	44.5±2.0	≥34	1.36-1.5
	F280	≥99	≤0.15	≤0.15	≤59	36.5±1.5	≥28	1.23-1.4
	F320	≥99	≤0.15	≤0.15	≤49	29.2±1.5	≥22	1.3-1.4
	F360	≥99	≤0.15	≤0.15	≤40	22.8±1.5	≥12	1.12-1.35
	F400	≥99	≤0.15	≤0.15	≤32	17.3±1.0	≥8	1.01-1.21
	F500	≥98.5	≤0.15	≤0.15	≤25	12.8±1.0	≥5	1.0-1.2
	F600	≥98.5	≤0.15	≤0.15	≤19	9.3±1.0	≥3	0.9-1.18
	F800	≥98.5	≤0.15	≤0.15	≤14	6.5±1.0	≥2	0.7-1.0
	F1000	≥98	≤0.20	≤0.20	≤10	4.5±0.8	≥1	0.6-0.7
	F1200	≥97.5	≤0.25	≤0.25	≤7	3.0±0.5	≥1	0.5-0.68

Note: JIS (#240, #280, #320, #360, #400, #500, #600, #700, #800, #1000, #1200, #1500, #2000, #2500, #3000) and P (P12 P16 P20 P22 P24 P30 P36 P40 P46 P54 P60 P70 P8O P90 P100 P120 P150 P180 P220, P240 P280 P320 P360 P400 P500 P600 P800 P1000 P1200) standard graded powder is also available. Other sizes are also available on request.

Green Silicon Carbide Product Code: GSC
Item	F Grit	Chemical Composition (%)			Size Distribution (%)			Bulk Density (g/cm3)	Physical Data	Typical Applications
		SiC (% min)	Fe2O3 (% max)	F.C. (% max)	D3	D50	D94
Marco Grits	F24, F30, F36, F40, F46, F54, F60, F70, F80, F90, F100, F120	99.00	0.15	0.15	-	-	-	1.38-1.60 (Depends on particle size)	Melting point (℃): 2250 Maximum service temperature (℃): 1900 Specific Gravity: 3.90g/cm3 Mohs Hardness: 9.4	Precision finishing grinding wheels Cutting and precision lapping materials of quartz, silicon Cutting and precision lapping materials of ceramics Corrosion resistant materials
	F150, F180, F220	98.50	0.20	0.20	-	-	-	1.30-1.48 (Depends on particle size)
Micro Powder	F240	≥99	≤0.15	≤0.15	≤70	44.5±2.0	≥28	1.38
	F280	≥99	≤0.15	≤0.15	≤59	36.5±1.5	≥22	1.31
	F320	≥99	≤0.15	≤0.15	≤49	29.2±1.5	≥16.5	1.28
	F360	≥99	≤0.15	≤0.15	≤40	22.8±1.5	≥12	1.26
	F400	≥99	≤0.15	≤0.15	≤32	17.3±1.0	≥8	1.16
	F500	≥99	≤0.15	≤0.15	≤25	12.8±1.0	≥5	0.98
	F600	≥99	≤0.15	≤0.15	≤19	9.3±1.0	≥3	-
	F800	≥98.5	≤0.15	≤0.15	≤14	6.5±1.0	≥2	-
	F1000	≥97	≤0.15	≤0.15	≤10	4.5±0.8	≥1	-
	F1200	≥96.5	≤0.15	≤0.15	≤7	3.0±0.5	≥0.8	-

Note: JIS (#240, #280, #320, #360, #400, #500, #600, #700, #800, #1000, #1200, #1500, #2000, #2500, #3000) standard graded powder is also available. Other sizes are also available on request.

Alfa Chemistry is the world's leading manufacturer and marketer of superhard material, and we provide you with a wide range of high-quality silicon carbide products, including black silicon carbide and green silicon carbide products. All products have a comprehensive range of sizes and specifications to meet your various needs. Our silicon carbide products are produced using the latest manufacturing techniques and equipment, ensuring consistent quality and performance. If the product you need is not in our product catalog, we can also customize the product according to your needs. Please feel free to contact us, if necessary.