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Black Silicon Carbide Grain for abrasives

What is the black silicon carbide?
1. black silicon carbide (SiC), also known as carborundum, is a compound of silicon and carbon with chemical formula SiC.
2. black silicon carbide (SiC) is made from quartz sand and petroleum coke( or coal tar), wood chips as raw material through high temperature smelting in electric resistance furnace.
3. black silicon carbide (SiC) can be used widely for abrasive sand, refractory material, and deoxidizer for foundry and steel casting etc.

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Black Silicon Carbide Grain — Product Introduction

Product Overview

Black silicon carbide grain is a non-metallic mineral product produced by high-temperature smelting at over 1,800°C, using quartz sand (SiO₂) and anthracite coal or petroleum coke (C) as basic raw materials. It features high hardness, low expansion coefficient, brittleness, and good thermal conductivity. It is a widely used basic industrial material and one of our company's main products.

Product Features

1. High Hardness, Strong Wear Resistance

Black silicon carbide has a high Mohs hardness, second only to diamond and cubic boron nitride. It is an ideal hard abrasive and wear-resistant material, performing excellently in grinding and wear-resistant applications.

2. Low Expansion Coefficient, Good High-Temperature Stability

With a low thermal expansion coefficient, it maintains good dimensional stability under high-temperature environments without easy deformation. It is suitable for refractory materials and high-temperature applications.

3. Good Thermal Conductivity, Excellent Heat Dissipation

It offers outstanding thermal conductivity, making it suitable for applications requiring heat dissipation or thermal conduction, such as electronic device grinding and heat dissipation materials.

4. Strong Chemical Stability, Acid and Alkali Resistant

With high chemical inertness, it resists acids, alkalis, and corrosion. It maintains stable performance under various harsh environments and does not react with common chemicals.

5. Brittle and Easily Crushed, with Sharp Cutting Edges

It has appropriate brittleness, allowing it to continuously maintain sharp cutting edges during grinding, resulting in high grinding efficiency and long service life.

Main Applications (Key Focus)

Black silicon carbide grain is used in a wide range of applications, mainly including the following categories:

1. Abrasives and Grinding Tools Industry

This is the most traditional and highest-volume application area for black silicon carbide. It can be used to manufacture:

• Grinding wheels: vitrified bond wheels, resin bond wheels, etc.

• Cutting discs: for cutting metal and stone

• Sandpaper and abrasive cloth: for woodworking and metal surface polishing

• Grinding paste and grinding fluid: for precision grinding

• Sandblasting media: for rust removal, paint removal, and surface strengthening of metals

It is suitable for grinding hard alloys, glass, ceramics, stone, cast iron, and other hard and brittle materials, especially materials with low tensile strength and high brittleness.

2. Refractory Materials Industry

Black silicon carbide grain is an important raw material for high-quality refractories:

• Refractory bricks: for linings of blast furnaces, converters, electric furnaces, and other high-temperature kilns

• Castables and ramming mixes: monolithic refractories

• Kiln furniture: setters and supports for ceramic and glass firing

• High-temperature furnace tubes and thermocouple protection tubes

It offers advantages such as high-temperature strength, good thermal shock resistance, and strong slag resistance, significantly extending kiln service life.

3. Electronic Product Grinding

• Semiconductor material grinding: grinding and polishing of silicon wafers and silicon carbide wafers

• Electronic components: grinding of piezoelectric ceramics and magnetic materials

• LED substrates: grinding and polishing of sapphire substrates

4. Special Ceramics and Foam Ceramics

• Structural ceramics: sealing rings, bearings, nozzles, bulletproof plates, etc.

• Functional ceramics: conductive ceramics, heating elements

• Foam ceramics: for molten metal filtration and high-temperature flue gas filtration

5. Additive Modification for Coatings and Plastics

As a functional filler added to coatings and plastics, it can:

• Improve the wear resistance and weather resistance of coatings

• Enhance the thermal conductivity and dimensional stability of plastics

• Strengthen the mechanical strength of composite materials

6. Automotive Parts

• Brake pads: improve friction coefficient and wear resistance

• Clutch plates: enhance friction performance and heat resistance

• Exhaust system components: high-temperature and corrosion resistance

7. Military and Aerospace

• High-temperature structural materials for aerospace

• Special protective armor materials

• Precision optical device grinding

8. Deoxidizer for Steelmaking

Used as a deoxidizer in the steelmaking process, it effectively removes oxygen from molten steel and improves steel quality.

Technical Specifications

 

 

Item	Parameter
Chemical Composition	SiC
Raw Materials	Quartz sand (SiO₂) + anthracite/petroleum coke (C)
Production Temperature	≥1,800°C
Color	Black
Product Type	Grain
Standards	ASTM, FEPA, JIS, ISO
Customization	Can be processed and produced according to customer requirements

Our Advantages

• ✅ Stable Quality: Advanced testing equipment and strong technical force ensure stable product quality

• ✅ Full Standards: Products comply with ASTM, FEPA, JIS, and ISO standards, and can also be customized

• ✅ Sufficient Capacity: Annual production of 6,000 tons of various grain sizes, strong supply capability

• ✅ Rich Export Experience: Products are exported to Japan, the United States, Europe, Southeast Asia, and other countries, highly praised by customers

• ✅ Fast Delivery: Short delivery time, flexible customization, competitive prices