Heating Elements/

SiC Heating Elements

A SiC heating element, or silicon-carbide heating element, is a type of non-metallic high temperature ceramic heating element. Using silicon and carbon as the main raw materials, SiC heating elements are capable of higher operating temperatures and watt loadings than metallic heating elements. Typically either an extruded tubular rod or cylinder, SiC heating elements are self-supporting and can be used in furnaces that are too wide or too long for metallic or MoSi2 heating elements.

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Chromalox
Pittsburgh, PA
800-443-2640
Established in 1915, Chromalox has been a leader in the heat solutions industry. With the broadest product line in the industry and an extensive inventory of nearly one million items in stock, Chromalox is able to provide heat and control solutions quickly to keep your facility up and running. When it comes to SiC heating elements, they can find the perfect product for your application.
 
Watlow Electric Manufacturing Company
St. Louis, MO
800-WATLOW2
By designing and manufacturing the complete thermal system, Watlow Electric Manufacturing Company is able to recommend, develop and deliver the optimal thermal solution for their customers' equipment and process heat requirements. When it comes to SiC heating elements, you can depend on Watlow to provide outstanding customer service and high quality goods.
 
Detroit Radiant Products Company
Warren, MI
800-222-1100
Established in 1955, Detroit Radiant Products Company strives to fulfill their commitment to quality by continuing to do what they have proven to work well. This devoted commitment to quality allows us to offer only the finest in equipment, including SiC heating elements. For all your product needs, turn to the experts. Call or visit our website today so we can get started!
 
Thermal Devices
Mt. Airy, MD
800-282-9100
The friendly customer service staff at Thermal Devices is prepared to help you find the best SiC heating elements for your new project. No matter the application, they have the perfect solution for your needs. With an extensive catalog of options including heaters, systems and related accessories, you can rest assured you will find everything you need. Call today to get started!
 
Solaronics, Inc.
Rochester, MI
800-223-5335
Solaronics enjoys a unique opportunity: the ability to identify and fulfill the needs of customers with a still infantile technology. Through their respected network of representatives and distributors, and their knowledgeable employees, you can locate the ideal SiC heating elements for your project. Today and for years to come, the company will search for new opportunities to aid customers.
 
Intek Corporation
Union, MO
800-387-8559
Providing new and refurbished parts, custom options, and replacement parts, INTEK Corporation has everything you need at prices you can work with. In addition to their complete line of parts, the company provides parts service and repairs for dryers and ovens of any make or model. For your next SiC heating elements order, call a company that gives the extensive variety of options you need.
 
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IQS Newsroom Articles on SiC Heating Elements

SiC Heating Elements

Advantages to employing silicon carbide heating elements includes corrosion resistance, heat zone resistance, minimal operation-induced deformation, cold end resistance, easy maintenance and a long service life. However, there are some disadvantages, and they include a higher risk of fracture compared to other heating element compositions, increased electrical resistance over time as well as more expensive power control equipment than metallic heating elements. SiC heating elements are widely used for applications such as electric furnaces, kilns and other electric heating devices in industries including powder metallurgy, ceramics, metal processes, glass, semiconductor, scientific research and electronics.

SiC heating elements are formed through either a reaction-bonding process or a recrystallization process. In the reaction bonding process, liquid silicon is used to infiltrate compacts made of mixtures of SiC and carbon. As a result, the silicon then reacts with the carbon in order to form silicon carbide. In the recrystallization process, high-density, high-purity green silicon carbide is formed into a blank and then silicided under extremely high temperatures. Next the silicon carbide is recrystallized, and fine grains of silicon carbide are formed, which act as connection points between large grains, resulting in conductive pathways. As a result of the high heat resistance of silicon carbide, temperatures must be in excess of 3900ยบ F (2150° C) in order for either process to work. SiC heating elements can be used in temperatures ranging from 600° C to 1650° C, and they do not require a protective atmosphere. While there are several external factors that can affect the service life of SiC heating elements, including type of service, furnace atmosphere, maintenance and watt density, SiC heating elements will most likely fail mechanically rather than as a result of aging.