Uses of Silicon Carbide (SiC): Applications in Abrasives, Refractories, Metallurgy and Semiconductor Industries

What Is Silicon Carbide?

Silicon carbide (SiC), also known as carborundum, is an advanced ceramic material composed of silicon and carbon with the chemical formula SiC.

Due to its combination of extreme hardness, high-temperature stability, excellent thermal conductivity and chemical resistance, silicon carbide is widely used in industrial applications including abrasives, refractory materials, steelmaking, foundry, ceramics and power electronics.

Different SiC grades are selected according to application requirements, such as metallurgical grade SiC (70–90%), black silicon carbide, green silicon carbide and SiC powder.

Key Properties of Silicon Carbide

These properties make silicon carbide suitable for applications requiring high wear resistance, heat resistance and electrical performance.

Main Applications of Silicon Carbide

1. Abrasives and Grinding Tools

One of the traditional and largest applications of silicon carbide is as an abrasive material.

Because SiC has high hardness and sharp crystal structure, it is widely used in:

Sandpaper

Grinding wheels

Cutting discs

Abrasive belts

Polishing materials

Surface treatment tools

Silicon carbide abrasives are commonly applied in:

Metal processing

Glass processing

Stone cutting

Ceramic processing

The hardness of SiC allows efficient material removal while maintaining good grinding performance.

2. Refractory Materials and High-Temperature Components

Silicon carbide has excellent resistance to high temperatures, thermal shock and chemical corrosion, making it an important refractory raw material.

Typical applications include:

SiC refractory bricks

Kiln furniture

Furnace linings

Ceramic tubes

Heat exchangers

High-temperature structural components

In industries such as metallurgy, ceramics and chemical processing, SiC materials help maintain stable performance under extreme temperature conditions.

3. Metallurgical Applications in Steelmaking and Foundry

Metallurgical-grade silicon carbide is widely used in steel and casting industries.

Steelmaking Applications

SiC can act as:

Deoxidizer

Carbon additive

Silicon and carbon source

During steel production, silicon carbide helps improve furnace efficiency and adjust the chemical composition of molten metal.

Foundry Applications

In cast iron production, SiC is used as:

Inoculant

Graphitization promoter

Metallurgical additive

It helps improve:

Carbon distribution

Graphite formation

Casting quality

Molten iron performance

Common metallurgical SiC grades include SiC 85%, SiC 88% and SiC 90%, depending on customer requirements.

4. Semiconductor and Power Electronics Industry

High-purity silicon carbide is an important third-generation semiconductor material.

Compared with traditional silicon materials, SiC offers:

Higher breakdown voltage

Higher operating temperature capability

Lower energy loss

Better power efficiency

SiC semiconductor applications include:

SiC MOSFETs

Schottky diodes

Power modules

Inverters

Electric vehicle charging systems

Renewable energy equipment

The wide band gap of SiC enables reliable operation in high-voltage and high-temperature environments.

5. Ceramic and Wear-Resistant Components

Due to its hardness and chemical stability, silicon carbide ceramics are used for components requiring long service life.

Applications include:

Mechanical seals

Wear plates

Pump components

Ceramic bearings

Corrosion-resistant parts

SiC ceramics provide excellent resistance against abrasion and aggressive operating conditions.

How to Choose the Right Silicon Carbide Grade?

Different industries require different SiC specifications.

Key purchasing factors include:

SiC content

Free carbon content

Silicon content

Particle size

Impurity levels

Packaging requirements

Silicon Carbide Supply from ZhenAn

ZhenAn supplies silicon carbide products for global customers in:

Steelmaking

Foundry

Refractory production

Abrasive manufacturing

Available products include:

Metallurgical Silicon Carbide

SiC 70%

SiC 85%

SiC 88%

SiC 90%

Black Silicon Carbide

Green Silicon Carbide Powder

Customized specifications and particle sizes are available according to application requirements.

Contact ZhenAn for Silicon Carbide Solutions

Looking for stable-quality silicon carbide for metallurgy, refractories or industrial applications?

Contact ZhenAn for product specifications and quotations.

WhatsApp: +86 15518824805
Email: info@zaferroalloy.com

FAQ About Silicon Carbide

1. What is silicon carbide used for?

Silicon carbide is mainly used in abrasives, refractory materials, steelmaking, foundry applications, ceramics and semiconductor devices.

2. Why is silicon carbide used in steelmaking?

In steelmaking, SiC works as a silicon and carbon source, deoxidizer and furnace additive to help adjust molten steel composition and improve metallurgical efficiency.

3. What is the difference between metallurgical SiC and abrasive SiC?

Metallurgical SiC focuses on chemical composition and furnace applications, while abrasive SiC requires controlled crystal structure and hardness for grinding and cutting applications.

4. What SiC grade is commonly used for steel production?

Metallurgical grades such as SiC 85%, SiC 88% and SiC 90% are commonly used depending on steel plant requirements.

5. Is silicon carbide resistant to high temperatures?

Yes. Silicon carbide maintains excellent stability at high temperatures and can withstand extreme thermal environments.

6. Can silicon carbide particle size be customized?

Yes. Silicon carbide can be supplied in different sizes, including lumps, granules, powder and mesh sizes according to customer requirements.