What Are the Types of Silicon Carbide? (Black vs Green SiC Explained)

Silicon carbide (SiC) is mainly classified into two industrial types based on purity and production process:

Black Silicon Carbide (Black SiC)

Green Silicon Carbide (Green SiC)

Each type serves different industrial applications depending on performance requirements and cost considerations.

1. Black Silicon Carbide (Black SiC)

Overview

Black SiC is produced by smelting quartz sand and petroleum coke at high temperatures.

Key Characteristics

SiC content: 85%–98%

Good hardness and toughness

Cost-effective

Stable chemical performance

Typical Applications

Steelmaking (deoxidizer)

Foundry industry

Sandblasting

Grinding and polishing

Refractory materials

👉 Best for: Industrial users who need cost-performance balance

2. Green Silicon Carbide (Green SiC)

Overview

Green SiC is made from higher purity raw materials, resulting in superior performance.

Key Characteristics

SiC content: ≥99%

Higher hardness than black SiC

More brittle

Excellent thermal conductivity

Higher purity

Typical Applications

Precision grinding

Semiconductor materials

Advanced ceramics

Optical glass processing

Electronic components

👉 Best for: Applications requiring high precision and high purity

Black vs Green Silicon Carbide: Key Differences

How to Choose Between Black and Green SiC

Choose Black Silicon Carbide if:

You are in steelmaking or foundry

You need lower cost material

You require bulk industrial use

Choose Green Silicon Carbide if:

You need high precision machining

You work in ceramics or electronics

You require high purity materials

Buyer's Tip (Important for Procurement)

In B2B sourcing, most buyers care about:

Purity consistency

Particle size distribution

Impurity levels (S, P)

Supply stability

👉 For steel plants, Black SiC 88%–90% is usually the most cost-efficient choice.

Why Choose ZhenAn for Silicon Carbide?

Stable supply of Black SiC 88% / 90%

Custom sizes (0–50 mm)

Strict quality control

Competitive factory pricing

Export experience

📩 Email: market@zanewmetal.com
📱 WhatsApp: +8615518824805

👉 Send your specifications to receive a fast quotation.

FAQ – Silicon Carbide Types

1. What is the main difference between black and green SiC?

Purity and hardness - green SiC is purer and harder.

2. Which SiC is better for steelmaking?

Black SiC is more suitable due to cost and performance balance.

3. Is green SiC stronger than black SiC?

It is harder but more brittle.

4. Why is green SiC more expensive?

Because of higher purity and stricter production process.

5. Can black SiC replace green SiC?

Not in high-precision applications.

6. What industries use green SiC?

Electronics, ceramics, and precision machining.