Carbon-Carbon Composite Insulation Barrels & Blankets

Explore premium carbon-carbon composite insulation barrels and blankets from BZNCarbon, designed for polycrystalline and monocrystalline silicon furnaces. High thermal resistance and lightweight durability.

BZNCarbon’s carbon-carbon composite insulation barrels and thermal blankets are engineered to provide superior heat containment, dimensional stability, and structural integrity within high-temperature processing environments. Designed primarily for solar-grade silicon production furnaces, these components are manufactured using multi-directional fiber reinforcements in 2D, 2.5D, or 3D formats to meet the highest thermal performance standards.

We offer a wide range of insulation solutions for Czochralski (CZ) single crystal and polycrystalline silicon ingot furnaces, ensuring energy efficiency, structural longevity, and optimal thermal uniformity.

What Are Carbon-Carbon Composite Insulation Barrels?

Carbon-carbon insulation barrels are precision-formed cylindrical structures composed of carbon fiber reinforcement and carbon matrix. These components are highly resistant to thermal degradation and maintain mechanical integrity at operating temperatures of up to 2800°C in inert gas and up to 2000°C in vacuum.

Compared to traditional graphite insulation, C/C composite insulation offers enhanced strength, reduced mass, and significantly longer service life, resulting in lower long-term operational costs.

Common Applications

For Polysilicon Hydrogenation Furnaces:

Inner and outer insulation barrels
U-type heaters
Insulation boards

For Polycrystalline Ingot Furnaces:

Crucible shielding covers
Base protection plates
Lining insulation boards

For Czochralski Single Crystal Furnaces:

Crucible carriers
Heat guide tubes
Inner and outer insulation barrels
End caps and thermal shields
Graphite-free high-purity covers

Material Options & Density

Structure Type	Typical Density (g/cm³)
2D	1.4–1.6
2.5D	1.5–1.8
Custom	On request

Each configuration can be customized in shape, thickness, and mechanical tolerance depending on application-specific requirements.

Advantages of BZNCarbon C/C Insulation

Thermal Resistance: Stable at extreme temperatures (2000–2800°C depending on atmosphere)
Mechanical Strength: 3x stronger than traditional graphite insulation
Low Mass: Reduces thermal lag and mechanical load in furnace structures
Superior Longevity: Minimizes material fatigue and replacement frequency
Excellent Thermal Shock Resistance: Maintains shape and properties under rapid heating/cooling cycles
Clean & Low Ash: Maintains ultra-low contamination for solar-grade processes
Custom Engineering: Designed to fit customer-specific furnace layouts or retrofit needs