Vulcasil H – Hybrid Mullite-Silicon Carbide Refractories

Vulcan Refractories is a leading supplier of Silicon Carbide Refractories to various businesses and industries around the world.

Vulcasil H has been meticulously engineered to meet the diverse needs of companies around the world.

Vulcasil H- Superior Hybrid Refractories

This carefully curated range of Silicon Carbide Refractories by blending precise proportions of mullite and silicon carbide. A unique combination allows for the manipulation and regulation of thermal conductivity while preserving exceptional mechanical strength. By adjusting the ratios of mullite and silicon carbide, Vulcasil H allows for tailored control over thermal conductivity, ensuring optimal performance in a variety of applications.

Despite variations in thermal conductivity, Vucasil H retains exceptional mechanical strength, providing a durable and long-lasting refractory solution.

Key Features:

• Precision Blending
• Customisable thermal properties
• Maintained mechanical strength

Applications: 

• Glass Manufacturing
• Ceramics Industry
• Metal Casting
• Heat Treatment Processes
• Incineration & Waste to Energy

Want to know more about Hybrid Mullite-Silicon Carbide Refractories? Contact Vulcan Refractories to see how our products can improve your facility’s processes. Get in touch via our contact form below

FAQs:

What are hybrid mullite–silicon carbide refractories?

Hybrid refractories combine mullite and silicon carbide in controlled ratios to create materials that balance thermal conductivity and mechanical strength. This hybrid design allows manufacturers to fine-tune performance depending on process requirements.

Why use a hybrid system instead of pure silicon carbide or mullite?

Pure silicon carbide offers excellent thermal conductivity and abrasion resistance, while mullite provides good insulation and structural integrity. By blending the two, hybrid refractories deliver the benefits of both. Maintaining strength under load while allowing thermal conductivity to be adjusted for specific furnace or kiln conditions.

In which industries are these refractories typically used?

Hybrid mullite–silicon carbide refractories are widely used in high-temperature and chemically aggressive environments, including:

• Ceramic kilns and firing zones.
• Metal casting and foundry linings.
• Heat treatment and thermal processing equipment.
• Waste-to-energy and incineration units.

How do these refractories perform under thermal cycling and mechanical stress?

These refractories maintain mechanical strength even when engineers adjust thermal conductivity. The mullite component increases resistance to thermal shock, while silicon carbide boosts abrasion resistance and stability during cyclic loading. As a result, they perform reliably in processes that involve frequent temperature changes.

Can hybrid mullite–silicon carbide refractories be customised for different applications?

Yes. Engineers can adjust the mullite-to-silicon carbide ratio to fine-tune thermal conductivity, density, and wear resistance for specific operating conditions. This flexibility allows them to perform effectively in both insulating applications and high heat transfer environments that demand exceptional mechanical durability.