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Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Specifications
Sample :
Customizable
Vickers Hardness(HV0.5) :
15-16GPa
Flexural Strength :
250MPa
Thermal Conductivity :
20-25W/(m.k)
Specific Resistivity :
10^14Ω·cm
Composition:SiC :
＞85%
Model Number :
Customizable
Elastic Modulus :
300-320GPa
Max. Service Temp :
1450℃
Apparent Porosity :
0-0.1%
Chemical Stability :
High
Compression Strength :
>1500MPa
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
Color :
Black
Density :
3.20-3.26g/cm3
Material :
Silicon Nitride
Description
Silicon Nitride (Si3N4) Heater Protection Tubes for Aluminum Industry
Our advanced silicon nitride ceramic heater protection tubes are engineered to deliver superior performance in aluminum melting and holding applications. With enhanced thermal and mechanical properties compared to conventional materials, silicon nitride enables reliable, long-lasting protection for your heating systems.
Key Advantages of Silicon Nitride Protection Tubes
  • Excellent High-Temperature Performance: Si3N4 is the ideal material for electric and gas heater protection tubes, offering superior high-temperature strength and thermal shock resistance (ΔT 400-500°C).
  • Extended Service Life: Withstands prolonged thermal loads from heating elements or burners, providing reliable operation for over one year.
  • Improved Energy Efficiency: Submerged heating with silicon nitride protection tubes can achieve 20-30% higher energy efficiency compared to traditional top radiant heating methods.
  • Prevents Molten Aluminum Oxidation: Minimizes overheating and oxidation of the upper aluminum layer, ensuring better metal quality.
  • Non-Reactive with Molten Aluminum: Does not contaminate the molten aluminum bath, helping to maintain metal purity and consistency.
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Technical Property Comparison: Silicon Nitride vs. Other Ceramics
Category Property Unit 99% Al₂O₃ S-SiC ZrO₂ Si₃N₄
Physical Properties
Density g/cm³ 3.9 3.1 6.0 3.2
Water Absorption % 0 0.1 0 0.1
Sintering Temperature °C 1700 2200 1500 1800
Mechanical Properties
Hardness (HV) HV 1700 2200 1300 1400
Flexural Strength MPa (kgf/mm²) ~343 (3500) ~392 (4000) ~882 (9000) ~686 (7000)
Compressive Strength MPa (kgf/mm²) ~2942 (30000) ~1961 (20000) ~1961 (20000) ~2255 (23000)
Thermal Properties
Max Working Temperature °C 1500 1600 1300 1400
Thermal Expansion Coefficient (0-1000°C) 10⁻⁶/°C 8.0 4.1 (0-500°C) 9.5 2.0 (0-500°C)
4.0 (500-1000°C)
Thermal Shock Resistance ΔT (°C) 200 250 300 400-500
Thermal Conductivity (25°C) W/m*K 31 100 3 25
Thermal Conductivity (300°C) W/m*K 16 100 3 25
Electrical Properties
Volume Resistivity (20°C) Ω*cm >10¹² 10⁶-10⁸ >10¹⁰ >10¹¹
Volume Resistivity (100°C) Ω*cm 10¹²-10¹³ - - >10¹¹
Volume Resistivity (300°C) Ω*cm >10¹² - - >10¹¹
Dielectric Strength kV/mm 18 Semiconductor 9 17.7
Dielectric Constant (1 MHz) ε 10 - 29 7
Dielectric Loss Tangent tan δ 0.4 * 10⁻³ - - -
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
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Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum

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Product Detail
Sample :
Customizable
Vickers Hardness(HV0.5) :
15-16GPa
Flexural Strength :
250MPa
Thermal Conductivity :
20-25W/(m.k)
Specific Resistivity :
10^14Ω·cm
Composition:SiC :
＞85%
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Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum
Silicon Nitride Heater Protection Tube with 1450℃ Max Service Temp, High Thermal Shock Resistance, and Non-Reactive with Molten Aluminum

Shaanxi KeGu New Material Technology Co., Ltd

Verified Supplier
2 Years
Shaanxi, tongchuan
Since 2017
Business Type :
Manufacturer, Trading Company
Main Products :
Silicon Carbide Ceramic, Heating Elements, Ceramic Powder
Certification Level :
Verified Supplier
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