U-Shaped MoSi₂ Heating Element for High-Temperature Furnaces

ZYLAB U-Shaped MoSi₂ Heating Element

Introduction

ZYLAB U-shaped MoSi₂ (Molybdenum Disilicide) heating elements are the ideal choice for demanding high-temperature applications. Operating up to 1800°C (3272°F), these elements are trusted worldwide for their superior performance in various atmospheres, including oxidizing, inert, nitriding, carburizing, and reducing environments.

Engineered with stability and longevity in mind, ZYLAB MoSi₂ elements exhibit:

• Stable electrical resistance even after long-term use

• Compatibility between old and new elements in series

• Fast thermal cycling with no performance degradation

• Self-healing SiO₂ protective layer in oxidizing atmospheres

• Custom dimensions for optimized fit and efficiency

Available Models & Customization

• Model: U-shaped MoSi₂ Heating Element

• Grades: 1700 / 1800

• Standard Diameters: 3/6, 4/9, 5/10, 6/12, 7/14, 9/18, 10/18, 12/24 mm

• Voltage: 220V–380V (customizable)

• Custom Specs Example: φc/φd = 6/12 mm, Le = 350 mm, Lu = 300 mm, a = 60 mm, Grade = 1700

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ZYLAB also offers a full range of accessories for MoSi₂ heating elements to ensure safe and efficient installation.

Applications of U-Shaped MoSi₂ Heating Element

1. Glass Industry

Used in primary glass manufacturing processes, including:

• Glass forehearth (feeder systems)

• Glass melting and fusing

• Fiberglass and specialty glass production

• Down-draw and overflow forming processes

2. Ceramics Industry

Ideal for the production of both traditional and advanced ceramics:

• Ceramic sintering

• High-temperature ceramic firing

• Post-processing of functional ceramics

• Sintering of 3D printed ceramic components

3. Metallurgical & Heat Treatment Industry

Suited for a wide range of heat treatment processes involving steel, aluminum, and alloy materials:

• Annealing furnaces

• Carburizing and hardening furnaces

• Galvanizing and tempering processes

• Metal sintering and debinding

4. Electronics Industry

Applied in precision heating systems required in electronics manufacturing:

• Single-crystal silicon (Si) and GaAs growth furnaces

• Diffusion furnaces and wafer processing

• MLCC (Multi-Layer Ceramic Capacitor) sintering

• ITO (Indium Tin Oxide) sintering

5. Other Advanced Applications

• Laboratory and research furnaces

• High-temperature additive manufacturing

• Powder metallurgy

• Refractory material processing

• Custom thermal processing systems requiring stable, clean high heat

Features & Benefits

• Maximum temperature: Up to 1800°C

• Excellent high-temperature oxidation resistance

• Quick thermal response for fast heating cycles

• Minimal resistance change—mixing old and new elements is possible

• Long service life with low maintenance frequency

• Energy efficiency and improved product quality

Physical & Chemical Properties

Oxidation Resistance:
At high temperatures, a dense quartz (SiO₂) layer forms on the surface, preventing further oxidation. If the temperature exceeds 1700°C, the SiO₂ layer melts (m.p. ≈1710°C), but reforms once cooled, maintaining protection.

Avoid prolonged use between 400–700°C, as severe low-temperature oxidation may cause element degradation.

MoSi₂ Heating Element Installation Guidelines

Because MoSi₂ elements are brittle at room temperature and ductile at high temperature, careful handling is required:

General Recommendations:

• Always use vertical mounting for U-type elements. If horizontal mounting is needed, use high-temperature insulating supports.

• The cone ends must extend into the furnace chamber.

• Do not overtighten the power connectors initially. Tighten again when heated to avoid breakage.

• Use matching ceramic spacers to separate the shanks.

Installation Steps:

1. Remove the wooden block from between the shanks.

2. Insert the element through the ceramic spacer into the mounting hole.

3. Push the element in until it touches the wooden block inside the furnace.

4. Fill any gaps with alumina fiber.

5. Install the ceramic fixture, aligning all screws in one direction.

6. Once all elements are in place, install the power tracks, ensuring they do not contact the fixture to prevent short circuits.

Note: MoSi₂ rods are fragile and should be handled with caution at all times.

Why Choose ZYLAB?

• Expert in high-temperature furnaces and components

• Global supplier to research and industrial users

• Full customization service with fast lead times

• Reliable technical support and after-sales service

For More Content

Please read our blog: MoSi2 Heating Elements: Complete Guide to Types, Selection, Installation, and Maintenance

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