Si Carbide

 

Black silicon carbide is produced by high-temperature reaction between silica-based and carbon-bearing raw materials, followed by crushing and screening into the required particle-size range.

For metallurgical applications, industrial SiC grades do not need the ultra-high purity required for semiconductor materials. The key purchasing factors are effective SiC content, carbon contribution, impurity control, particle-size consistency and batch stability.

You can also review our silicon carbide product range for other grades and size options.

 

The current product range covers several industrial SiC levels. The main difference is the effective silicon carbide content and corresponding impurity level.

Specification note: Grade names indicate the target SiC level. Final chemistry should follow the agreed purchase specification and actual batch COA.

 

SiC 85 and SiC 88 are both practical industrial grades. The higher grade provides slightly more effective silicon carbide per kilogram, while the final choice should also consider impurity limits, application and purchasing cost.

For a more detailed application guide, see our 85% Black Silicon Carbide guide .

You can also review 88% Silicon Carbide applications for steelmaking, foundry and other industrial uses.

 

Steelmaking

Metallurgical silicon carbide can provide both silicon and carbon to the melt. Depending on the furnace process, it can be used as a supplementary material for deoxidation and composition adjustment.

Foundry Production

In cast iron production, SiC can contribute silicon and carbon during melting. The suitable grade and dosage depend on the starting melt chemistry, furnace practice and required final composition.

Refractory Materials

Industrial black SiC can also be used as a refractory raw material where hardness, thermal stability and wear resistance are required.

Abrasive and Wear-Resistant Applications

Higher-grade black silicon carbide can be processed into granular or powder forms for abrasive and wear-resistant applications. For dedicated abrasive products, grit size and impurity control should be specified separately.

 

One reason metallurgical SiC is selected is that the material contains both silicon and carbon. This can allow both elements to be introduced through one raw material instead of being considered independently.

However, the final SiC dosage should not be fixed only by the nominal product grade. Actual addition depends on:

• Starting silicon content
• Starting carbon content
• Target steel chemistry
• Actual batch SiC content
• Silicon and carbon recovery
• Furnace and slag conditions

 

Particle size affects handling, charging, reaction behavior and material loss. The selected size should match the furnace and addition method.

 

A useful silicon carbide specification should contain more than the nominal SiC percentage.

 

Metallurgical silicon carbide and semiconductor-grade silicon carbide should not be treated as the same product.

The SiC 80–89% materials on this page are industrial raw materials for metallurgy, foundry and refractory applications. They are not 99.99% semiconductor-grade SiC and should not be described as wafer material.

If your application requires high-purity SiC powder, semiconductor crystal growth or electronic-grade material, the purity and trace-element specification must be confirmed separately.

 

For repeat industrial purchasing, both chemistry and physical size should remain consistent between batches.

• SiC content inspection
• Free carbon confirmation
• Agreed impurity limits
• Particle-size distribution
• Fines and oversize when specified
• Moisture control
• Packing inspection
• Batch COA confirmation

 

We can confirm the SiC grade, particle size, impurity limits, quantity and packing according to the required industrial application.

 

The quotation varies according to SiC grade, impurity limits, particle size, powder content, order quantity, packing and delivery terms.

For a recent reference for SiC 88%, see our SiC 88% price update .