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L-Type molybdenum disilicide heating elements are specially structured heating components based on the standard U-Type design, with cold ends bent 90 degrees outward or inward to form L-shaped terminals. This design retains the concentrated hot zone and top wiring advantages of U-Type elements while further optimizing furnace top space utilization to accommodate more complex installation environments.
Manufactured from high-purity MoSi₂ through high-temperature sintering, the hot zone and cold ends are integrally formed with high structural strength at the bent corner, eliminating cracking risk. Widely used in various high-temperature equipment with limited furnace top space, side exit wiring requirements, or special installation angles.
Specifications
Parameter | Specification range |
Hot Zone Diameter | Ø3mm – Ø12mm |
Cold End Diameter | Ø6mm – Ø24mm |
Hot Zone Length | 80mm – 800mm |
Cold End Length (Vertical) | 100mm – 500mm (each side) |
L-Section Length | 50mm – 300mm (customizable) |
Bend Direction | Outward bend / Inward bend |
Center Distance | 40mm – 200mm (customizable) |
Overall Height | Customized per request |
Resistance | 0.1Ω – 5.0Ω (at room temperature) |
Max Operating Temperature | 1800℃ (high-temperature grade) |
Applicable Atmosphere | Oxidizing atmosphere |
Structural Features
1. L-Shaped Right-Angle Terminal
Cold ends bent 90 degrees outward or inward to form L-shaped terminals, suitable for side wiring and limited furnace top space.
2. Compact Design
Right-angle bending significantly reduces the height required above the furnace top, ideal for space-constrained installations.
3. Bidirectional Bend Options
Outward bend (increasing element spacing) or inward bend (reducing element spacing) flexibly matches different furnace structures.
4. Integral Formation
Hot zone, vertical section, and L-section integrally sintered with no welded joints, ensuring structural reliability.
5. Aluminum-Sprayed Cold Ends
Cold ends and L-section terminals are aluminum-sprayed to significantly reduce contact resistance and improve electrical reliability.
Key Advantages
☆ High Space Utilization
Right-angle terminal design significantly reduces headroom requirements above the furnace top, suitable for low-clearance installations
☆ Installation Flexibility
Outward/inward bend options adapt to different furnace structures and wiring requirements
☆ Excellent Oxidation Resistance
Dense SiO₂ protective layer provides outstanding oxidation resistance and long service life
☆ Outstanding High-Temperature Stability
Minimal deformation at high temperatures, stable resistance, controllable temperature field
☆Structural Reliability
Integrally sintered with no welded joints at the bend, eliminating cracking risk
☆Clean Wiring
Terminals can be concentrated on one side of the furnace for easy maintenance and enhanced safety
Applications
Industry | Typical Applications |
Semiconductor | Diffusion furnaces,oxidation furnaces,annealing furnaces |
Glass | Glass melting furnaces,feeders,platinum channels |
Ceramics | Electronic ceramic sintering,structural ceramic sintering |
Metallurgy | Power metallurgy sintering,metal heat treatment |
Laboratory | High-temperature tube furnaces,box furnaces,vacuum furnaces |
New Energy | Lithium battery material sintering,photovoltaic materisl processing |
L-Type vs. U-Type MoSi₂ Rods
Comparison | U-Type | L-Type |
Headroom requirement | higher | lower |
Terminal direction | vertical upward | horizontal lateral |
wiring | concentrated at top | concentrated on one side |
suirable furnaces | ample headroom | limited headroom |
Maintenance | top access | side access |
Installation space | vertical space | vertical+horizontal space |
Bend Direction Selection Guide
Bend Direction | Recommended Application |
Outward Bend | Need to increase element spacing; limited center space |
Inward Bend | Need to reduce element spacing; limited sidewall space |
Symmetrical Bend | Legs bent in opposite directions for balanced stress |
Installation & Operating Precautions
Installation Guidelines
· Furnace top/sidewall openings should be 1.4-1.6 times the cold end diameter to allow thermal expansion
· Avoid additional stress at the right-angle bend; ensure terminal sections are insulated from the furnace body during installation
· Clamps should grip the smooth aluminum-sprayed cold end surface, never on the bent section
· When multiple elements are connected in parallel, resistance matching within 5% deviation is recommended
Operating Precautions
· MoSi₂ elements are brittle at low temperatures; avoid impact and mechanical stress during installation and operation, especially at the right-angle bend
· Gradual temperature ramping is required for initial use; preheating between 200-400℃ is recommended to avoid thermal shock
· Avoid prolonged use in the 400-700℃ range, as low-temperature oxidation can damage the element
· Not suitable for reducing atmospheres, nitrogen atmospheres (above 1350℃), or vacuum environments (at high temperatures)
Customization Services
We support non-standard customization based on drawings or parameters to meet various special operating conditions:
Customization Item | Description |
Bend Direction | Outward / Inward / Symmetrical bend |
L-Section Length | Customizable within 50-300mm |
Center Distance | Customizable within 40-200mm |
Cold End Length | Adjustable based on furnace top/sidewall thickness |
Resistance Value | Precisely matched to process requirements |
High-Temperature Grade | Standard 1700℃ / High-temp grade 1800℃ |
For quotation, please provide:
· Hot zone diameter and length
· Cold end diameter and length (vertical section)
· L-section length and bend direction
· Center distance
· Resistance value (at room temperature)
· Operating temperature and atmosphere
· Drawings or special requirements
Equipment & Inspection
Note: Our silicon carbide heating elements undergo three rigorous quality inspections before being approved for shipment.
Packing&Transport
HHSIC Frequently Asked Questions
1. What are your factory's strengths?
· Established in 2004 – Nearly 20 years of industry experience
· Modern production lines – Automated equipment with strict process control
· ISO9001 certified – Quality management throughout every stage
· In-house R&D team – Continuous development of new materials and custom designs
2. How do you ensure product quality?
We implement rigorous quality control at every step:
· All incoming raw materials are inspected
· Sintering processes are monitored in real time
· Every element undergoes resistance testing, visual inspection, and dimensional verification
· Each batch is traceable with complete test records
3. Is there a minimum order quantity?
No. Most standard models have no MOQ – you can order just one piece. We encourage trial orders before moving to larger volumes.
4. What are your typical lead times?
· Standard products: 7-10 days
· Custom products: 15-30 days (depending on complexity)
Expedited processing is available for urgent requirements.
5. How do you handle shipping?
Shipping is arranged based on order size and customer location:
· Small quantities: Sent via DHL, FedEx, or UPS for fast delivery
· Large orders or complete furnaces: Shipped by sea or air freight, with the most cost-effective route confirmed in advance
6. Where do you export?
We ship to over 50 countries across Europe, the Americas, Southeast Asia, the Middle East, and Africa. Available trade terms include EXW, FOB, CIF, and DDP.
7. What is your warranty policy?
· Heating elements (consumables): If manufacturing defects (cracks, incorrect dimensions, abnormal resistance) are found within 30 days of receipt, contact us for replacement. Normal wear from use is not covered.
· Lifetime technical support is always available.
8. Do you provide technical support?
Yes. Our engineering team offers:
· Installation guidance and operation training
· Troubleshooting and maintenance recommendations
· Full technical documentation for OEM clients
9. Can I get samples?
Yes. Samples of selected models are available free of charge; you only pay the shipping cost. This is the best way to verify performance and compatibility before placing a bulk order.
