Molybdenum Disilicide (MoSi2) Thermal Elements Electric Furnace Heating Element

Introduction

Molybdenum disilicide (MoSi2) heating element is a high temperature resistant heating element made by molybdenum disilicide. When used in high-temperature oxidizing atmosphere, a layer of bright and dense silica (SiO2) glass film is formed on the surface, which can protect the inner layer of silicon molybdenum from oxidation. Therefore, molybdenum disilicide (MoSi2) heating element have unique high-temperature oxidation resistance.

Under the oxidation atmosphere, the maximum operating temperature is 1800 ℃. The resistance of the MoSi2 heating element increases rapidly with the increase of temperature. When the temperature is constant, the resistance value is stable. 

Under normal conditions, the element resistance does not change with the length of service time, the correct selection of the surface load of the electric heating element is the key to the service life of the silicon molybdenum bar electric heating element.

Application

Molybdenum dicilicide (MoSI2) heaters are widely used in metallurgy, steel making, glass, ceramics, refractories, crystals, electronic components, semiconductor materials, research, production and manufacturing and other fields, especially for the production of high-performance precision ceramics, high-grade artificial crystals, precision structural metal ceramics, glass fibers, optical fibers and high-grade alloy steel.

• High-Temperature Furnace Operations: MoSi2 elements are crucial in the operation of high-temperature furnaces used in the production of ceramics, glass, and metals, where temperatures can reach up to 1800°C.
• Laboratory Research: In scientific research, these elements are employed in laboratory furnaces for materials testing and synthesis at high temperatures.
• Industrial Processing: They are integral in various industrial processes such as sintering, annealing, and heat treatment of materials.
• Semiconductor Manufacturing: MoSi2 heating elements are used in the fabrication of semiconductors, where precise temperature control is vital.

Detail &Parts

Features 

• Molybdenum Disilicide (MoSi2) Heating Elements are renowned for their exceptional performance in high-temperature environments, offering a range of benefits that make them a superior choice for various industrial applications. These elements are not only capable of operating at the highest temperatures but also exhibit remarkable durability and ease of use. Here are the key features that highlight the advantages of MoSi2 Heating Elements:
• High Operating Temperatures: MoSi2 Heating Elements can withstand temperatures up to 1900°C in oxidizing atmospheres, making them ideal for processes requiring extreme heat. 
• Stable Resistance: The stable resistance of MoSi2 elements allows for the connection of new and old elements in series without compromising performance. This feature is particularly beneficial for maintaining consistent heating conditions and prolonging the lifespan of the elements.
• Thermal Cycling Resilience: These elements can undergo rapid thermal cycling without degradation, which is crucial for processes that require frequent temperature changes. This resilience ensures that the elements maintain their integrity and efficiency over time.
• Ease of Replacement: MoSi2 Heating Elements are designed for easy replacement, even when the furnace is hot. This feature minimizes downtime and ensures that operations can continue smoothly without significant interruptions.
• Long Inherent Life: With the longest inherent life among electric heating elements, MoSi2 elements offer a cost-effective solution by reducing the frequency of replacements and maintenance.
• Oxidation Resistance: The formation of a protective quartz (SiO2) glass film on the surface of MoSi2 elements provides excellent oxidation resistance, safeguarding the elements from degradation in oxidizing atmospheres.
• Versatile Shapes and Sizes: Available in straight, U-shaped, W-shaped, L-shaped, or custom bent configurations, these elements can be tailored to fit a wide range of furnace designs and operational requirements.

Characteristics

Chemistry Properties

Molybdenum disilicide heating elements have unique high-temperature oxidation resistance. When used in high-temperature oxidizing atmosphere, a layer of bright and dense silica (SiO2) glass film is formed on the surface, which can protect the inner layer of molybdenum disilicide heating elements from oxidation.  

Physical Properties

Working performance in different atmospheres

How to mark the model of molybdenum disilicide (MoSi2) heating element?

• D1: Hot zone diameter
• D2: Cold zone diameter
• Le: Hot zone length
• Lu: Cold zone length
• A:  Gap distance 
• Standard model number: D1/D2*Le*Lu*A
• For example: D1=6mm, D2=12,Le=200mm,Lu=300mm,A=30mm
• You can specify its model as: 6/12*200*300*30mm

Dos and don'ts during the installation of molybdenum disilicide (MoSi2) heating element

Please click here for precautions when installing MoSi2 heating elements

Warnings

Operator safety is the top important issue! Please operate the equipment with cautions. Working with inflammable& explosive or toxic gases is very dangerous, operators must take all necessary precautions before starting the equipment. Working with positive pressure inside the reactors or chambers is dangerous, operator must fellow the safety procedures strictly. Extra caution must also be taken when operating with air-reactive materials, especially under vacuum. A leak can draw air into the apparatus and cause a violent reaction to occur.

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