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Silicon Carbide (SiC) Heating Elements | High-Temp Heating to 1600°C
High-performance silicon carbide heating elements for temperatures up to 1600°C. Superior thermal shock resistance & power density. Explore SW, U-Type, W-Type models for industrial furnaces.
Product Overview
Our Silicon Carbide (SiC) Heating Elements are engineered for extreme industrial heating applications. Capable of operating at temperatures up to 1600°C (2912°F), they deliver unmatched heat output, rapid thermal response, and long service life in both air and controlled atmospheres, making them a superior replacement for traditional metal alloy heaters.
Key Advantages of SiC Heating Elements
Exceptional Power Density: Generate 5 to 10 times more heat per unit surface area than standard Nichrome wire, enabling faster heat-up and higher operating temperatures.
Superior Mechanical Strength: Excellent resistance to thermal shock and physical deformation, ensuring reliability under rapid temperature cycling and demanding industrial conditions.
Clean & Quiet Operation: The heat source is entirely free of noise, emissions, and air pollution, making it ideal for sensitive processes like sintering, brazing, and crystal growth.
Product Types & Applications
1. SW Type (Standard Rod)
Applications: Universal heating element for a wide range of furnace types.
Features: Operating range from 600°C to 1400°C (up to 1600°C in suitable conditions). Can be installed both vertically and horizontally.
Ideal For: General high-temperature furnaces, research labs, and ceramic kilns.
2. U-Type (Hairpin Shape)
Applications: Compact furnaces where space is constrained.
Features: Consists of two identical SiC rods connected by a low-resistance SiC bridge, which can also serve as a mounting point. Provides a concentrated heat zone.
Ideal For: Tube furnaces, and processes requiring a localized high-temperature zone.
3. W-Type (3-Phase Configuration)
Applications: Large-scale industrial heating requiring high power input.
Features: A three-rod, one-side terminal design (SGC for vertical, SGD for horizontal installation) that connects directly to a three-phase power supply.
Ideal For: Float glass production, large batch sintering, and other heavy-duty industrial processes.
Technical Data & Properties
Property
Value
Specific Gravity
2.6 - 2.8 g/cm³
Bend Strength
> 300 MPa
Hardness
> 9 Mohs
Tensile Strength
> 150 kg/cm²
Porosity Rate
< 30%
Radiance
0.85
Operating Guidelines & Atmosphere Compatibility
The performance and lifespan of SiC elements are highly dependent on furnace temperature and atmosphere.
Atmosphere
Max Recommended Temp (°C)
Surface Load (W/cm²)
Potential Risk & Effect
Air / Oxygen
1600
15-25
Slow oxidation forms protective SiO₂ layer.
Hydrogen (H₂)
1290
10-15
Can produce methane, destroying the protective SiO₂ layer.
Nitrogen (N₂)
1370
10-15
Can form an insulating silicon nitride layer, increasing resistance.
Water Vapor
1090-1370
10-15
Reacts to form silicon hydrate, accelerating element degradation.
Chlorine / Halogen
704
15-25
Highly corrosive, rapidly destroys the SiO₂ layer and attacks SiC.
Critical Installation & Usage Notice
Storage: Keep elements dry and protected from moisture to prevent performance degradation.
Matching: For multi-element furnaces, sort and group elements so their resistance values are within a 10% tolerance to ensure even load distribution.
Handling: SiC is hard but brittle. Handle with care during installation and maintenance to avoid breakage.
Start-Up: Always use a controlled ramp-up voltage when starting a cold furnace. Avoid immediate full power to prevent excessive inrush current from damaging the elements.
Replacement: Replace damaged elements with new ones of similar resistance. If multiple elements have failed or their resistance has increased significantly, consider a full set replacement for balanced performance.
