Silicon Carbide Tube — High-Performance SiC Ceramic for Harsh Industrial Environments

Product Overview

Shenzhen Great Ceramic’s Silicon Carbide Tube is a high-performance ceramic component engineered for use in extremely harsh environments where traditional metals or alumina ceramics fail.
Manufactured from high-purity sintered silicon carbide (SiC), the tube provides outstanding resistance to wear, corrosion, and high temperatures. It delivers reliable performance in demanding conditions such as molten metal handling, acid gas environments, and high-temperature processing.

Key Features

• Excellent thermal conductivity ranging from 120 to 200 W/m·K, ensuring efficient heat transfer.

• Exceptional hardness greater than 25 GPa (equivalent to Mohs 9+), providing superior wear resistance.

• Outstanding corrosion and oxidation resistance against acids, alkalis, and aggressive gases.

• Low thermal expansion coefficient of approximately 4.0 × 10?? per Kelvin, maintaining dimensional stability during thermal cycling.

• Lightweight but dense structure, with a typical density between 3.1 and 3.2 g/cm³.

• Custom dimensions available for inner and outer diameters, wall thickness, and total length.

Applications

This silicon carbide tube is widely used across multiple industries:

In metallurgy and foundry, it serves as furnace protection tubes, thermocouple sheaths, and molten metal liners.
In the chemical and petrochemical industry, it is applied in reactors, pipelines, and heat exchanger tubes exposed to acids and corrosive gases.
In semiconductor manufacturing, it functions as diffusion and oxidation tubes, or precision components for wafer processing.
In power and energy systems, it works reliably as burner tubes and fuel reformer components under high thermal stress.
In aerospace and defense, it provides lightweight and durable solutions for propulsion systems and gas flow control at high temperatures.

Technical Specifications

The silicon carbide tube is made from high-purity sintered SiC with a density of approximately 3.1 to 3.2 grams per cubic centimeter.
Its hardness exceeds 25 gigapascals, giving it exceptional abrasion resistance.
Thermal conductivity ranges between 120 and 200 watts per meter-kelvin, allowing for excellent heat transfer in high-temperature environments.
The tube operates stably at temperatures up to 1600 degrees Celsius (2912 degrees Fahrenheit) and maintains minimal deformation due to its low thermal expansion coefficient of about 4.0 × 10?? per Kelvin.
It provides excellent corrosion resistance when exposed to acids, alkalis, and oxidizing gases.
Surface roughness can reach Ra 0.8 micrometers or better upon request, and both round and square cross-section shapes are available.

Advantages Over Traditional Materials

Compared to metal or stainless-steel tubes, silicon carbide tubes offer far higher thermal conductivity, better corrosion resistance, and longer service life under high-temperature or chemical conditions.
They are also much harder and more wear-resistant than alumina ceramics, while maintaining sufficient toughness to handle mechanical stress.
This makes silicon carbide tubes a preferred choice for applications that require both mechanical strength and chemical stability.

Quality and Manufacturing

Each silicon carbide tube is produced through a precise and ISO-certified manufacturing process.
High-purity SiC powders are selected as the raw material to ensure consistency and performance.
Forming and sintering processes are optimized to achieve high density and strength.
After sintering, the tubes are precisely machined and polished to achieve the required tolerances and surface finish.
Every tube undergoes comprehensive testing for density, hardness, and corrosion resistance before shipment.
Inspection reports and quality certificates can be provided upon request.

Ordering Information

Custom sizes are available, with inner and outer diameters from 5 millimeters to 150 millimeters and lengths up to 1500 millimeters.
Standard dimensional tolerance is ±0.1 millimeter, and tighter tolerances are available upon request.
Sample orders for testing and prototyping are accepted.
Typical lead time is between 2 to 4 weeks depending on quantity.
Products are packaged in export-grade foam and wooden crates to ensure safe transport.

About Shenzhen Great Ceramic

With over a decade of experience in advanced ceramics, Shenzhen Great Ceramic is a trusted manufacturer specializing in silicon carbide, alumina, and zirconia components.
We provide high-performance ceramic solutions for industries such as energy, semiconductor, chemical, and aerospace.
Our engineering team supports custom designs, machining, and OEM services to meet your specific industrial requirements.