# W Shape MoSi2 Heating Elements ## W Shape MoSi2 Heater Description CVSIC W-Type Molybdenum Disilicide (MoSi2) heating element, shaped like a “W,” is crafted from high-purity MoSi2 using advanced hot-bending technology and a unique formula, with a density of 5.5-6.2 g/cm³ and a maximum operating temperature of 1850℃. Its “three U-shaped” design boasts uniform curvature, wide center spacing, and high hot-end density, making it ideal for horizontal setup in large electric kilns. Aluminum-coated cold ends ensure strong conductivity, while a special surface coating boosts thermal shock resistance and lifespan. It works great for ceramics, electronics, lithium batteries, and high-temperature processing. ## W Shape MoSi2 Technical Parameters | Diameter (d/c, mm) | Le(hot zone) Length | Lu(cold zone) Length | c(mm) | d(mm) | f(mm) | g(mm) | A(mm) Std/Min | | --- | --- | --- | --- | --- | --- | --- | --- | | 3/6 | Customizable | Customizable | 6 | 3 | 25 | 15 | 25/16 | | 4/9 | Customizable | Customizable | 9 | 4 | 25 | 15 | 25/19 | | 6/12 | Customizable | Customizable | 12 | 6 | 45 | 25 | 50/26 | | 9/18 | Customizable | Customizable | 18 | 9 | 75 | 30 | 60/38 | | 12/24 | Customizable | Customizable | 24 | 12 | 100 | 40 | 80/54 | Note: Dimensional tolerance ±5% (except c and d), Lu length 150-1000mm, Le length 150-1500mm, customizable. ### MoSi2 Heating Element Resistance versus Time ![mosi2 heating element resistance versus time](https://cvsicelement.com/wp-content/uploads/2025/08/MoSi2-Heating-Element-Resistance-versus-Time.webp) ## Maximum Temperature in Different Atmospheres | Atmosphere | Grade 1700 | Grade 1800 | Grade 1850 | | --- | --- | --- | --- | | NO2, CO2, O2, Air | 1700℃ | 1800℃ | 1850℃ | | He, Ar, Ne | 1650℃ | 1750℃ | 1800℃ | | SO2 | 1600℃ | 1700℃ | 1750℃ | | CO, N2 | 1500℃ | 1600℃ | 1700℃ | | Wet H2 | 1400℃ | 1500℃ | 1650℃ | | Dry H2 | 1350℃ | 1450℃ | 1600℃ | ## Resistivity Characteristics - Resistivity increases rapidly with temperature, delivering high power at low temperatures to speed up heating; at high temperatures, power drops to minimize overheating risks. - Resistivity stays stable over time, with a slight initial decrease (≈5%); new and old elements can be used together. ## Ordering Information When ordering W-Type MoSi2 heating elements, please provide the following parameters: - **Material Grade**: 1700/1800/1850 - **d/c**: Hot zone/cold zone diameter (mm) - **Le**: Hot zone length (mm) - **Lu**: Cold zone length (mm) - **A**: Shank spacing (mm) - **Example**: W-Type, 1800 grade, d/c=3/6mm, Le=140mm, Lu=125mm, A=25mm, denoted as: 1800/W-Type/3/6x140x125x25 ![w shape mosi2 heating element drawing](https://cvsicelement.com/wp-content/uploads/2025/08/W-Shape-MOSi2-Heating-Element-Drawing.webp) Note: For additional specifications or custom options, please get in touch with us. ## W Shape MoSi2 Rod Connection Method - **Contact Surface Design**: Both cold ends are aluminum-coated for low-resistance contact and efficient conductivity. - **Electrical Connection**: Secure with flat aluminum braid and spring clips, compatible with 220-480V power; use an SCR voltage regulator (for precise temperature control) for best results. - **Note**: Ensure connectors fit snugly to the cold end, with connection end voltage <0.01V; pick the right material grade (1700/1800/1850) based on atmosphere type. ## W Shape MoSi2 Elements Application Fields CVSIC W-Type MoSi2 heating elements are widely used in: - **Large High-Temperature Furnaces**: Supports ceramic sintering, glass manufacturing, and high-density layout processes. - **Electronic Semiconductors**: Used for wafer sintering, diffusion furnaces, and encapsulation material heating. - **Lithium Battery Materials**: Facilitates high-temperature processing of battery anode and cathode materials. - **Rare Earth Phosphors and Precision Casting**: Provides high-temperature stability and uniform heating. - **Laboratory Furnaces**: Meets high-temperature experimental and material testing needs. ## CVSIC W Shape MoSi2 HeaterProduct Advantages - **Ultra-High Temperature Resistance**: Operates up to 1850 °C, ideal for extreme environments. - **High Oxidation Resistance**: High-density MoSi2 (5.5-6.2 g/cm³) with a special coating ensures top-notch oxidation resistance and long lifespan. - **Quick and Consistent Heating**: 4% thermal elongation delivers even temperature fields, fast heating, and shorter furnace warm-up times. - **Thermal Shock Resistance**: The W-Type “three U-shaped” design, with uniform curvature, offers substantial creep and thermal shock resistance. - **Energy Efficiency**: Wide center spacing and high hot-end density reduce wiring and cut cold/hot-end interface losses. - **Corrosion Resistance**: Low porosity (7.4%) and water absorption (0.2%) make it suitable for various atmospheres, enhancing its durability. - **Stable Resistivity**: Resistivity remains constant over time, enabling the mixed use of new and old elements. - **Global Service**: ISO-certified factory, 360-ton annual capacity, offers free samples, and 7-30 day delivery. ## W Shape MoSi2 Bar Installation Method To ensure the performance and safety of W-Type MoSi2 heating elements, follow these steps: - **Inspect Element**: Check for cracks or damage before setup to ensure the surface coating is intact. - **Installation Position**: Set up horizontally, with three U-shaped bends supported by corundum spacer bricks, and insert cold ends into the furnace, keeping the transition zone unexposed to avoid overheating damage. - **Spacing Design**: Maintain adequate distance from furnace walls and materials (at least 3 times the hot end diameter) to prevent heat buildup. - **Fixing Device**: Use ceramic or heat-resistant steel clips to secure cold ends, with corundum spacer bricks supporting the three U-shaped bends to avoid mechanical stress. - **Power Connection**: Connect the cold end to power with a flat aluminum braid and spring clips, ensuring solid contact and voltage <0.01V. - **Preheating**: Gradually ramp up power during first use to avoid thermal shock. - **Regular Maintenance**: After 2-3 hours of operation, check and re-tighten the connection screws to account for thermal relaxation. Regularly inspect the clips and corundum spacer bricks for stability. ## Replacement Steps - Locate the damaged element and prepare a replacement set. - Disconnect the power, remove the aluminum braid and connecting screws, and clear the refractory material and plugs. - Insert a new element from the furnace top, ensuring the corundum spacer bricks are correctly placed. Reconnect the wires and refill the refractory material. - Gradually heat to ensure regular operation. *Note*: Professionals should perform installations and replacements. Contact us for detailed guidance. ## W Shape MoSi2 Rod Design Recommendations To optimize the performance of W-Type MoSi2 heating elements, follow these suggestions: - **Length Matching**: Ensure Lu (150-1000mm) and Le (150-1500mm) match furnace dimensions, avoiding hot end insertion into furnace walls. - **Shank Spacing Design**: Choose a value (standard or minimum) based on diameter for optimal hot-end density and stability. - **Atmosphere Selection**: Pick 1700/1800/1850 grade based on atmosphere (e.g., O2, N2, H2), referring to the maximum temperature table. - **Spacing Design**: Maintain a clearance of at least three times the hot end diameter between the element and furnace walls/materials and at least four times the diameter for center-to-center spacing to optimize heat distribution. - **Temperature Control System**: Utilize a PID controller for precise temperature control to prolong the element’s lifespan. - **Support Design**: Use corundum spacer bricks to support the three U-shaped bends, ensuring even load distribution to prevent deformation. ## Customization Services CVSIC offers flexible customization for W-Type MoSi2 heating elements: - **Size Customization**: Adjust hot/cold zone diameter, Lu/Le length, and shank spacing (A). - **Grade Selection**: Offer 1700/1800/1850 grades to suit different atmospheres and temperature needs. - **Special Coatings**: Offer oxidation-resistant coatings for enhanced performance and extended lifespan in demanding environments. - **OEM/ODM Services**: Support bulk wholesale, free samples, no minimum order quantity, and 7-30 day delivery. - **Technical Support**: Offer expert guidance and thermal simulation for selection and setup. - Contact us for customized solutions or free samples! CVSIC is focused on providing top-notch W-Type MoSi2 heating elements to optimize ceramics, electronics, lithium batteries, and extensive high-temperature furnace processes. 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