Silicon Carbide Heater

Silicon Carbide Heaters are the ultimate solution when standard metal elements melt or fail. Manufactured from recrystallized high-purity alpha silicon carbide, these elements are the “special forces” of the thermal world. Unlike metallic elements that soften under extreme heat, SiC rods maintain their rigid form and electrical properties even at blistering temperatures up to 1600°C.

At Walta Heater, we engineer these elements to thrive where others perish—specifically in oxidizing and corrosive atmospheres. Whether you need a simple rod (DB type) or a complex spiral design (SG/SGR), our SiC heaters provide the robust thermal stability needed for advanced laboratory and industrial furnaces.

• Pure Alpha SiC Construction: Made from high-purity recrystallized silicon carbide for superior thermal shock resistance.

• Extreme Temperature Capable: Safely operates at surface temperatures up to 1600°C, far exceeding the limits of NiCr or FeCrAl alloys.

• Diverse Configurations: Available in multiple shapes to fit any furnace design:

  • Rod Types: DB (Dumbbell), DH (Equal Diameter/High Resistance), DL (Equal Diameter/Low Resistance).

  • Complex Shapes: U-Type, W-Type (3-Phase), Single Spiral (SG), and Double Spiral (SGR).

• Self-Supporting Structure: The rigid nature of SiC means these elements will not deform or sag, eliminating the need for complex support hooks.

• Flexible Mounting: Can be installed vertically or horizontally without fear of bending under their own weight.

• Zero Deformation: Unlike metal elements that “creep” or elongate over time, SiC remains rigid. Consequently, you can design furnaces with optimal interior configurations without worrying about elements shorting out against the walls.
• Chemical Resistance: The specialized oxide layer that forms on the surface protects the element from further oxidation and chemical attack, ensuring a long service life in harsh atmospheres.
• High Power Density: These heaters can handle significantly higher watt loads per square centimeter than metallic elements. Therefore, you can achieve faster ramp-up rates and higher throughput in your production line.
• Versatile Installation: The ability to mount them horizontally or vertically gives furnace designers complete freedom.
• Easy Replacement: Many SiC element designs allow for replacement while the furnace is still hot, minimizing expensive downtime.

Uses & Applications of Silicon Carbide Heater