Silicon Nitride Bonded Silicon Carbide (NSiC) Crucibles
Silicon Nitride Bonded Silicon Carbide (NSiC) Crucibles
Product Overview
Our NSiC crucibles are high-performance ceramic vessels designed for melting, holding, and casting metals, alloys, and specialty materials at elevated temperatures. Bonded with a silicon nitride (Si₃N₄) matrix, they offer an optimal balance of thermal conductivity, mechanical strength, and chemical inertness, making them ideal for aggressive melting environments.
Key Properties
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Max Service Temperature: Up to 1,450°C (1,500°C intermittent)
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Excellent Thermal Shock Resistance: Withstands rapid heating and cooling without cracking
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High Corrosion Resistance: Inert to most molten metals, slags, fluxes, and acids
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Good Thermal Conductivity: Efficient heat transfer for energy-saving melting
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High Mechanical Strength: Maintains structural integrity under heavy loads
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Low Porosity & Permeability: Prevents metal penetration and contamination
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Long Service Life: Outperforms conventional clay/graphite crucibles
Typical Specifications
| Parameter | Value |
|---|---|
| Bulk Density | ≥ 2.65 g/cm³ |
| Apparent Porosity | ≤ 17% |
| Flexural Strength (RT) | ≥ 80 MPa |
| Flexural Strength (1,200°C) | ≥ 70 MPa |
| Thermal Conductivity (1,000°C) | ≥ 16 W/m·K |
| CTE (RT–1,200°C) | ~5.0 × 10⁻⁶/°C |
| Max Operating Temp | 1,450°C |
Customization Options
We offer comprehensive customization to suit your specific melting requirements:
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Capacity: 0.5L – 200L (or as required)
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Shapes: Cylindrical, conical, rectangular, or custom profiles
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Wall Thickness: Standard or reinforced heavy-duty designs
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Lids & Covers: Flat, domed, or vented lids available
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Pouring Features: Tapered rims, spouts, or lip designs for clean pouring
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Handling Options: Lifting lugs, bails, or fork pockets
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Surface Finish: As-sintered or glaze-coated for enhanced protection
Typical Applications
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Melting and holding non-ferrous metals (aluminum, copper, zinc, brass)
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Precious metal refining (gold, silver, platinum)
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Glass melting and specialty glass production
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Alloy preparation and foundry operations
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Chemical and laboratory high-temperature processing
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Battery material calcination