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Brand Name : KEGU
Place of Origin : China
Price : 200-500 yuan/kg
Payment Terms : L/C,D/A,D/P,T/T,Western Union,MoneyGram
Supply Ability : 2,000 pcs/month
Packaging Details : Strong wooden box for Global shipping
Model Number : Customizable
Material : Silicon Nitride
Composition:SiC : >85%
Color : Black
Density : 3.20-3.26g/cm3
Max. Service Temp : 1450℃
Flexural Strength : 250MPa
Sample : Customizable
Chemical Stability : High
Apparent Porosity : 0-0.1%
Elastic Modulus : 300-320GPa
Compression Strength : >1500MPa
Vickers Hardness(HV0.5) : 15-16GPa
Thermal Conductivity : 20-25W/(m.k)
Specific Resistivity : 10^14Ω·cm
Product Description
Our high-performance silicon nitride ceramic materials are engineered specifically for the aluminum industry, delivering superior thermal and mechanical properties compared to traditional alternatives. This innovation enables groundbreaking products like the L-shaped high thermal conductivity submerged heating appliance, setting a new standard for efficiency and durability in aluminum processing equipment.
We utilize a pioneering slip-casting formation process to manufacture silicon nitride pouring spoons and crucibles. This method maximizes the inherent advantages of silicon nitride, offering:
Ultimate Thermal Shock Resistance (ΔT 400–500°C)
Superior Non-Stick Aluminum Properties
Excellent Corrosion & Wear Resistance
These products represent the definitive solution for aluminum melt handling, significantly extending service life compared to spoons and crucibles made from other ceramic materials.


Silicon Nitride Ceramics: Technical Property Comparison
| Category | Property | Unit | 99% Al₂O₃ | S-SiC | ZrO₂ | Si₃N₄ |
| Physical | Density | g/cm³ | 3.9 | 3.1 | 6.0 | 3.2 |
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| Water Absorption | % | 0 | 0.1 | 0 | 0.1 |
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| Sintering Temperature | °C | 1700 | 2200 | 1500 | 1800 |
| Mechanical | Hardness (HV) | HV | 1700 | 2200 | 1300 | 1400 |
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| Flexural Strength | MPa (kgf/mm²) | ~343 (3500) | ~392 (4000) | ~882 (9000) | ~686 (7000) |
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| Compressive Strength | MPa (kgf/mm²) | ~2942 (30000) | ~1961 (20000) | ~1961 (20000) | ~2255 (23000) |
| Thermal | Max Working Temperature | °C | 1500 | 1600 | 1300 | 1400 |
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| Thermal Expansion Coefficient (0-1000°C) | 10⁻⁶/°C | 8.0 | 4.1 (0-500°C) | 9.5 | 2.0 (0-500°C) |
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| 5.2 (500-1000°C) |
| 4.0 (500-1000°C) |
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| Thermal Shock Resistance | ΔT (°C) | 200 | 250 | 300 | 400-500 |
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| Thermal Conductivity (25°C) | W/m·K | 31 | 100 | 3 | 25 |
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| Thermal Conductivity (300°C) | W/m·K | 16 | 100 | 3 | 25 |
| Electrical | Volume Resistivity (20°C) | Ω·cm | >10¹² | 10⁶–10⁸ | >10¹⁰ | >10¹¹ |
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| Volume Resistivity (100°C) | Ω·cm | 10¹²–10¹³ | – | – | >10¹¹ |
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| Volume Resistivity (300°C) | Ω·cm | >10¹² | – | – | >10¹¹ |
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| Dielectric Strength | kV/mm | 18 | Semiconductor | 9 | 17.7 |
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| Dielectric Constant (1 MHz) | ε | 10 | – | 29 | 7 |
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| Dielectric Loss Tangent | tan δ | 0.4 × 10⁻³ | – | – | – |
Why Choose Our Silicon Nitride Pouring Spoons & Crucibles?
Longer Service Life: Exceptional durability reduces replacement frequency and downtime.
Improved Efficiency: Excellent non-wetting properties minimize aluminum adhesion and material loss.
Enhanced Reliability: Unmatched thermal shock resistance prevents cracking during rapid temperature changes.
High-Temperature Stability: Maintains structural integrity in demanding aluminum processing environments.

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Silicon Nitride Pouring Spoon and Crucible with Ultimate Thermal Shock Resistance and Superior Non-Stick Aluminum Properties for the Aluminum Industry Images |