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ED-Type Silicon Carbide Heating Element
ED-Type Silicon Carbide Heating Element
ED-Type Silicon Carbide Heating Element

ED-Type Silicon Carbide Heating Element

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ED-Type SiC Heating Element – Product Details

5D’s ED-Type SiC Heating Element are available in ED equal-diameter and HD high-density equal-diameter variants; manufactured with in-house R&D technology. The HD type has a density up to 2.96 g/cm³, maximum temperature of 1625°C, corrosion and oxidation resistance, and a continuous service life of up to 2200 hours. Customization (OEM/ODM) is supported.

  • Product：ED-Type Silicon Carbide Heating Element (SiC Rod)
  • Material: High-Purity Green α-SiC (Hexagonal Silicon Carbide)
  • Temperature: Up to 1625°C (in oxidizing atmosphere)
  • Voltage: 110–480V
  • Density: HD Type 2.96 g/cm³, ED Type 2.65 g/cm³
  • Diameter: 8–85 mm (Cold End/Hot End)

 

5D-Materials ED-Type Silicon Carbide Rod Advantages

  1. High Density: Proprietary process, density up to 2.96 g/cm³, excellent stability.
  2. High-Temperature Resistance: Working temperature up to1625°C, fast heating, high thermal efficiency.
  3. High Mechanical Strength: Bending strength 100–120 MPa, shock and impact resistant, no deformation at high temperature.
  4. Corrosion/Oxidation Resistance: High-purity SiC material, resistant to acid, alkali, and oxidation, suitable for harsh furnace environments.
  5. Long Service Life: Service life up to 2200 hours, low maintenance cost.
  6. Multiple Models: SG, SGR, U, W, M, ED/HD, and more, compatible with various industrial furnaces (annealing, sintering, tube furnaces, etc.).
  7. Energy-Efficient & Eco-Friendly：Uniform heating, low energy consumption, meets green industrial standards.
  8. International Standards：ISO-certified factory, annual capacity 500 tons.
  9. Export-Grade Packaging: Cardboard box + foam liner + reinforced wooden case for safer shipping.

 

ED-type Silicon Carbide Heating Element - Applications

  1. Metallurgy & Heat Treatment: Quenching, tempering, annealing, carburizing/nitriding, powder metallurgy sintering, MIM molding, stress relief, and metal material testing.
  2. Glass: Glass melting auxiliary heating, glass kilns, glass annealing, glass fiber manufacturing, etc.
  3. Ceramics: Structural ceramics, electronic ceramics, piezoelectric ceramics, ceramic sintering, and kiln heating for tunnel furnaces, muffle furnaces, etc.
  4. Electronics: Diffusion, oxidation, CVD/PVD, magnetic material sintering, thin-film processing, crystal growth, etc.
  5. Lithium Battery Materials: Calcination of cathode/anode materials, precursor decomposition, and functional powder processing.
  6. Organic Incineration: Human/animal cremation furnaces, organic waste incineration, medical waste, and organic pyrolysis.
  7. Laboratory & Research:  Ideal for box furnaces, tube furnaces, muffle furnaces, and other pilot-scale or testing systems.

 

Definition of Silicon Carbide Heating Element

The silicon carbide (SiC) heating element is a non-metallic resistor made from high-purity α-SiC, recrystallized at 2200°C. It operates on the Joule heating principle, converting electricity into heat upon current flow.

These elements feature a unique resistance-temperature relationship: a negative temperature coefficient (resistance decreases) below 800°C, switching to positive above 800°C. The maximum service temperature reaches 1500°C in air​ and up to 1625°C in specific atmospheres. A protective silica (SiO₂) layer forms at high temperatures, slowing oxidation. However, resistance increases irreversibly over time (aging), necessitating voltage adjustment to maintain constant power.

SiC heating elements are widely used in industrial kilns and experimental equipment for high-temperature processes, including sintering furnaces for ceramics/refractories, high-temperature furnaces for powder metallurgy and glass, semiconductor diffusion/annealing, and laboratory muffle furnaces.

 

ED-Type Silicon Carbide Rod - Product Structure Diagram

Product Structure Explanation:

  • OD：Outer Diameter (mm)
  • HZ：Hot Zone Length (mm)
  • CZ：Cold Zone Length (mm)
  • OL：Overall Length (mm)
  • R：Ω (Customizable)

Example: ED type, OD=16mm, HZ=150mm, OL=550mm, R=1.14Ω, denoted as: ED-550*150*16

Note: Contact us for other specifications or customization.

 

ED-Type SiC Heating Rod Installation Method

  1. Inspection: Check for cracks before installation. Ensure no structural issues in the furnace affecting rod placement.
  2. Installation: Vertical or horizontal installation supported. Self-supporting at high temperatures.Furnace must allow for free thermal expansion.
  3. Fixing: Install ceramic holders or special clamps on cold ends, ensuring clamps are outside the hot zone to prevent overheating.
  4. Power Connection: Use flat aluminum braid and spring clamps to connect to 110–480V power supply, matching resistance correctly.
  5. Heating Debugging: Gradually raise to working temperature to avoid thermal shock. Enter normal load after furnace temperature stabilizes.
  6. Regular Maintenance: Check aluminum-coated connectors and clamps for looseness or corrosion.
  7. Note: Installation should be performed by professionals. Contact us for detailed manuals.

 

ED-Type Heating Scenario Design Recommendations

ED-Type SiC Heating Element Configuration & Furnace Matching :

  • Hot Zone Length: Match the furnace chamber's effective heating width. Prevent contact with furnace walls to avoid ablation.
  • Cold Zone Length: Set as furnace wall thickness plus a 50–150 mm external allowance. Avoid insufficient length (causing cold-end overheating) or excessive length (increasing non-heating zones).
  • Furnace Port Size: Recommended port diameter is 1.4–1.6 times the cold end diameter. Seal with ceramic fiber gaskets to accommodate thermal expansion and prevent stress damage.
  • Spacing Design: Maintain a minimum distance of ≥3× element OD from furnace charge or walls. Center-to-center spacing between adjacent SiC rods should be ≥4× OD. This reduces radiation shielding and improves temperature uniformity.
  • Temperature Control System: An intelligent system is recommended for precise regulation, suppressing thermal shock and extending service life.
  • Atmosphere: Optimal in oxidizing atmospheres. For reducing, carburizing, or hydrogen-rich conditions, reduce operating temperature or implement protective measures. Contact us for specific application guidance.

 

ED-Type Silicon Carbide Rod - Product Size Chart

Number Size Hot Zone surface area Nominal loading values*
External Diameter Hot Zone Length Cold End Length Overall Length
mm mm mm mm cm² Volts Watts Ohms
ED-550*150*16 16 150 200 550 75 39 1330 1.14
ED-600*200*16 200 200 600 101 50 1700 1.47
ED-650*250*16 250 200 650 126 61 2070 1.8
ED-700*300*16 300 200 700 150 72 2450 2.12
ED-800*300*16 300 250 800 150 74 2520 2.17
ED-900*300*16 300 300 900 150 76 2580 2.24
ED-900*400*16 400 250 900 200 96 3260 2.83
ED-1000*400*16 400 300 1000 200 98 3330 2.88
ED-950*450*16 450 250 950 225 107 3640 3.15
ED-1000*500*16 500 250 1000 250 118 4010 3.47
ED-1100*500*16 500 300 1100 250 120 4080 3.53
ED-1100*600*16 600 250 1100 300 140 4760 4.12
ED-700*300*20 20 300 200 700 188 65 3120 1.35
ED-800*300*20 300 250 800 188 66 3170 1.37
ED-900*300*20 300 300 900 188 68 3260 1.42
ED-1100*300*20 300 400 1100 188 71 3410 1.48
ED-900*400*20 400 250 900 251 86 4130 1.79
ED-1000*400*20 400 300 1000 251 88 4220 1.84
ED-1100*400*20 400 350 1100 251 90 4320 1.88
ED-1200*400*20 400 400 1200 251 91 4370 1.89
ED-1150*450*20 450 350 1150 283 100 4800 2.08
ED-1100*500*20 500 300 1100 314 108 5180 2.25
ED-1300*500*20 500 400 1300 314 111 5330 2.31
ED-1200*600*20 600 300 1200 376 128 6140 2.67
ED-1300*600*20 700 300 1300 439 148 7100 3.09
ED-1400*800*20 800 300 1400 502 168 8060 3.5
ED-1000*400*25 25 400 300 1000 314 76 4940 1.17
ED-1200*400*25 400 400 1200 314 79 5140 1.21
ED-1100*500*25 500 300 1100 392 94 6110 1.45
ED-1300*500*25 500 400 1300 392 97 6310 1.49
ED-1100*600*25 600 250 1100 470 110 7150 1.69
ED-1200*600*25 600 300 1200 470 111 7220 1.71
ED-1300*700*25 700 300 1300 550 129 8390 1.98
ED-1400*700*25 700 350 1400 550 130 8450 2
ED-1500*700*25 700 400 1500 550 131 8520 2.01
ED-1300*700*30 30 700 300 1300 660 117 10100 1.36
ED-1500*700*30 700 400 1500 660 119 10200 1.39
ED-1400*800*30 800 300 1400 750 133 11400 1.55
ED-1200*400*35 35 400 400 1200 439 64 6850 0.6
ED-1100*500*35 500 300 1100 549 78 8350 0.73
ED-1200*500*35 500 350 1200 549 79 8450 0.74
ED-1300*500*35 500 400 1300 549 79 8450 0.74
ED-1300*600*35 600 350 1300 659 94 10100 0.87
ED-1400*600*35 600 400 1400 659 94 10100 0.87
ED-1600*600*35 600 500 1600 659 96 10300 0.89
ED-1500*700*35 700 400 1500 769 109 11700 1.02
ED-1500*800*35 800 350 1500 879 124 13300 1.16
ED-1800*1000*35 1000 400 1800 1099 154 16500 1.44
ED-2000*1400*35 1400 300 2000 1539 213 22800 1.99
ED-1500*600*40 40 600 450 1500 753 88 11500 0.67
ED-1700*700*40 700 500 1700 879 103 13500 0.79
ED-1600*800*40 800 400 1600 1005 115 15100 0.88
ED-1700*1000*40 1000 350 1700 1256 143 18700 1.09
ED-1700*1000*45 45 1000 350 1700 1413 117 19700 0.69
ED-2300*1500*50 50 1500 400 2300 2356 182 33900 0.98

Nominal load values measured in open air at 1000°C. Converted to current values, tolerance is ±15% of center current value.

Use the table above to select the rod type suitable for your application. Contact us for free samples if interested.

 

Metallized Width

Outside diameter (mm) Metallized Length (mm)
16 (30)
20 or more (50)
35 or more (50)

 

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