90% of black silicon carbide is mainly composed of silicon carbide (SiC), with a content of about 90%. The rest are impurities, such as silicon dioxide (SiO₂), iron oxide (Fe₂O₃), free carbon (F.C), etc. The impurity content is usually strictly limited. For example, SiO₂ generally does not exceed a certain proportion to ensure the performance of silicon carbide.

Chemical properties

Chemical stability: The chemical properties are stable, and it is not easy to react with common chemicals such as acids and alkalis at room temperature. It can resist the erosion of corrosive substances such as slag and metal oxides, and is suitable for various harsh chemical environments.

Antioxidation: In When the temperature is below 1400℃, a layer of silicon dioxide film will form on the outside of the particles, which can prevent further oxidation of silicon carbide, so that the refractory products made of it can resist the erosion of oxidizing media such as oxygen and water vapor, and extend the service life.

silicon Carbide 0-1mm silicon carbide 1-10mm

chemical composition

Grade	Sic%	FreeC%	Si+SiO2%	Fe2O3	MgO%	H2O%
Sic75	75±4	2.5±1	17±2	3	0.16	<5
Sic65	65±4	4.5±1	23±2	4	0.12	<5
Sic55	55±4	4.8±1.5	28±3	5±2	0.1	<5
Sic45	45±4	5±2	31±3	7±2	0.1	<5

Size Range	Chemical Composition %
Size Range	SIC	F.C	Fe2O3
16#-90#	>98.50	<0.02	<0.60
100#-180#	>98.50	<0.30	<0.80
220#-240#	>98.50	<0.30	<1.20

Size Range	Chemical Composition %
Size Range	SIC	F.C	Fe2O3
20#-90#	>99.00	<0.20	<0.20
100#-180#	>98.50	<0.25	<0.50
220#-240#	>98.00	<0.25	<0.70

Model	Chemical Composition %
Model	SiC	Free Carbon	Fe2O3
SiC 98	98 min	0.2 max	0.60 max
SiC 97	97.0 min	0.3 max	1.20 max
SiC 90	90.0 min	1.0 max	1.20 max
SiC 88	88.0 min	4.0 max	1.5 max
Model-SiC Briquette	SiC	Al2O3	Fe2O3
SiC Briquette 70	70.0 min	5.0 max	3.0 max
SiC Briquette 65	65.0 min	5.0 max	3.0 max

Key Features & Benefits

Optimal Grain Size:

The 1-10mm distribution ensures uniform melting and reaction rates in metallurgical processes.

High Thermal Resistance:

Maintains structural integrity in temperatures exceeding 1600°C, ideal for furnace linings.

Superior Deoxidation:

With a 90% SiC content, it effectively removes oxygen from molten steel, improving final product quality and reducing costs.

Chemical Stability:

Highly resistant to acid and alkali erosion, ensuring long-lasting performance in harsh environments.

Black SiC

Primary Applications

Metallurgy: Used as a powerful deoxidizer and carbon additive in steelmaking and iron casting.

Refractories: An essential raw material for manufacturing SiC bricks, kiln furniture, and crucibles.

Abrasives: Suitable for coarse grinding and sandblasting on non-ferrous metals and stone materials.

Functional Ceramics: Used in the production of wear-resistant components.

FAQ

Q: Why choose 90% purity Black SiC for metallurgical use?

A: The 90% grade offers the best balance between cost-efficiency and performance. It provides sufficient carbon and silicon for deoxidation while being more economical than 98% high-purity grades used in electronics.

Q: What is the packaging for 1-10mm Black SiC?

A: We typically provide 1MT big bags or 25kg plastic woven bags. Custom packaging solutions are available upon request to meet your logistics needs.

Q: Can Aon Metals provide customized grain sizes?

A: Yes. While 1-10mm is a standard size, we can adjust the crushing and screening process to meet your specific particle size distribution (PSD) requirements.

Black SiC