Silicon Nitride-Bonded Silicon Carbide (Si₃N₄-Bonded SiC) Refractory Material

1.Product Overview

This refractory material is manufactured via advanced sintering technology, where silicon nitride (Si₃N₄) acts as a bonding phase to connect silicon carbide (SiC) grains. The unique composite structure solves the brittleness issue of traditional SiC materials while enhancing thermal shock resistance-critical for environments with frequent temperature fluctuations. It is typically supplied in forms like bricks, tubes, or custom-shaped components to fit diverse industrial equipment.

 

2.Key Features

Extreme High-Temp Performance：Max working temperature up to 1600℃, maintaining structural stability even in long-term high-heat operations (e.g., ceramic kiln firing zones).

Superior Thermal Shock Resistance：Can withstand rapid temperature changes (ΔT ≥ 800℃) without cracking, suitable for equipment that starts/stops frequently.

Strong Corrosion & Wear Resistance：Resists erosion from acidic/alkaline slags, molten metals, and high-speed 气流 (gas flow), extending component service life by 50% vs. ordinary refractories.

Low Thermal Expansion & High Strength：Thermal expansion coefficient as low as 4.5×10⁻⁶/K, minimizing thermal stress; cold crushing strength ≥ 300MPa, bearing heavy loads in kiln structures.

 

3.Technical Parameters

| Parameter | Specification |

|--------------------------|---------------------|

| Main Composition | SiC (70%-85%), Si₃N₄ (10%-20%) |

| Bulk Density | 2.6-2.8 g/cm³ |

| Apparent Porosity | 8%-12% |

| Max Working Temperature | 1550-1600℃ |

| Cold Crushing Strength | ≥300MPa |

| Thermal Expansion Coefficient (20-1000℃) | 4.2-4.8×10⁻⁶/K |

| Thermal Shock Resistance (ΔT) | ≥800℃ |

| Corrosion Rate (1500℃, 24h) | ≤0.5mm/24h |

 

4.Application Scenarios

Ceramic & Glass Industry：Kiln furniture (beams, shelves), roller kiln rollers, and glass furnace throat linings-withstanding high heat and glass liquid erosion.

Metallurgy Industry：Blast furnace tuyeres, molten metal flow channels, and heat exchanger components-resisting slag and metal corrosion.

Chemical Industry：High-temperature reactor linings, catalyst supports, and gasification furnace parts-enduring chemical media and high-pressure environments.

 

5.Service and Support

Customization：Supports custom shapes (bricks, tubes, special-shaped parts) and dimensions (length 50-4000mm, thickness 5-50mm) with MOQ 100 pieces.

Samples & Quality Assurance：Free samples available (customer covers shipping); products comply with ISO 9001 and CE standards, with batch test reports provided.

Lead Time & Packaging：15-20 days for standard orders; packaged in fumigated wooden boxes (50 pieces/box) to prevent damage during shipping.

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