U, W, I Type Silicon Carbide (SiC) Heating Elements with 1625°C Operating Temperature and Oxidation Resistance for High Temperature Furnaces
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MOQ:
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Delivery Time:
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Product Description
Silicon Carbide (SiC) Heating Elements for High Temperature Furnaces
Premium non-metallic electric heaters engineered for extreme high-temperature industrial furnaces. Manufactured from high-grade green silicon carbide powder, these elements are formed, sintered, and recrystallized to deliver exceptional durability and thermal performance. Available in U, W, and I type configurations for demanding applications requiring rapid heat-up, oxidation resistance, and long service life in aggressive atmospheres.
Key Features & Benefits
- Extreme Temperature Capability - Operates reliably up to 1625°C (2957°F)
- Superior Material Properties - Excellent oxidation resistance, corrosion resistance, and low thermal expansion
- Fast Heating & Efficiency - High thermal conductivity enables rapid temperature ramp-up
- Versatile Designs - Available in standard U, W, and I shapes, with custom configurations on request
- Wide Industrial Application - Suitable for ceramics, metallurgy, glass, laboratories, and more
Physical & Thermal Properties
| Property | Value / Range |
|---|---|
| Specific Gravity | 2.6-2.8 g/cm³ |
| Bend Strength | >300 kg/cm² |
| Hardness | >9 Mohs |
| Tensile Strength | >150 kg/cm³ |
| Porosity Rate | <30% |
| Radiancy | 0.85 |
Temperature-Dependent Thermal Data
| Temperature (°C) | Linear Expansion Coefficient (10⁻⁶/°C) | Heat Conductivity (kcal/m*hr*°C) | Specific Heat (cal/g*°C) |
|---|---|---|---|
| 0 | - | - | 0.148 |
| 300 | 3.8 | - | - |
| 400 | - | - | 0.255 |
| 600 | 4.3 | 14-18 | - |
| 800 | - | - | 0.294 |
| 900 | 4.5 | - | - |
| 1100 | - | 12-16 | - |
| 1200 | 4.8 | - | 0.325 |
| 1300 | - | 10-14 | - |
| 1500 | 5.2 | - | - |
Applications
- Ceramics & Porcelain - Kiln firing, sintering
- Glass Industry - Float glass, optical glass production
- Metallurgy - Non-ferrous metal melting, powder metallurgy
- Laboratory & Research - High-temperature furnaces, test equipment
- Electronics & Magnets - Component annealing, processing
- Brazing & Heat Treatment - Industrial heating and joining processes
Operating Guidelines: Atmosphere & Surface Load
To ensure optimum performance and lifespan, operate within the recommended surface load limits based on your furnace atmosphere.
| Atmosphere | Max. Furnace Temp. (°C) | Max. Surface Load (W/cm²) | Effect on Element | Recommended Protection |
|---|---|---|---|---|
| Ammonia (NH₃) | 1290 | 3.8 | Reacts with SiC to form methane, degrading SiO₂ layer | Operate at dew point |
| Carbon Dioxide (CO₂) | 1450 | 3.1 | Attacks SiC | Use quartz tube shield |
| Carbon Monoxide (CO, 18%) | 1500 | 4.0 | Minimal effect | - |
| Carbon Monoxide (CO, 20%) | 1370 | 3.8 | Carbon adsorption affects SiO₂ layer | - |
| Halogen Gases | 704 | 3.8 | Corrodes SiC and destroys SiO₂ layer | Quartz tube shield |
| Hydrocarbons | 1310 | 3.1 | Carbon pickup causes hot spots | Ensure sufficient air flow |
| Hydrogen (H₂) | 1290 | 3.1 | Reacts with SiC, damages SiO₂ layer | Operate at dew point |
| Methane (CH₄) | 1370 | 3.1 | Carbon adsorption leads to hot spots | - |
| Nitrogen (N₂) | 1370 | 3.1 | Forms silicon nitride insulating layer | - |
| Sodium (Na) Vapor | 1310 | 3.8 | Attacks SiC | Quartz tube shield |
| Sulfur Dioxide (SO₂) | 1310 | 3.8 | Attacks SiC | Quartz tube shield |
| Vacuum | 1204 | 3.8 | Stable operation | - |
| Oxygen / Air | 1310 | 3.8 | SiC oxidizes (forms protective SiO₂) | - |
| Water Vapor | 1090-1370 | 3.1-3.6 | Forms silicon hydrates, accelerates aging | - |
Available Forms & Customization
We supply standard silicon carbide heating elements in various configurations:
- Shapes: Rods, tubes, bars, U, W, I, dumbbell, spiral
- Dimensions: Diameters 0.5-3 inches (12-76 mm), lengths 1-10 feet (0.3-3 m)
- Terminations: Metallized aluminum ends for reliable electrical connection
- Custom designs available upon request
Additional SiC products include: bricks, foam, honeycomb, powder, nanoparticles, whiskers, sputtering targets, and wool.
Packaging & Quality Assurance
All heating elements are carefully packaged using professional, environmentally friendly materials to ensure safe and secure delivery. Our stringent quality control process guarantees that every product meets high performance and reliability standards.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Shaanxi KeGu New Material Technology Co., Ltd
Location
5# Chaoyang Road,Weicheng Sub-district，Qinhan New City, Xixian New Area, Xi'an Shaanxi Province,China,712039
Contact Person
Yuki