Varmeelementer af siliciumkarbid

Silicon carbide heating elements are used in applications requiring high temperature electric furnaces. They come in a range of standard shapes and sizes to suit specific applications; customized designs may also be available upon request.

Resistance of an element changes with time and temperature, making voltage control difficult.

Benefits

Silicon carbide (SiC) heating elements for use in high temperature electric furnaces offer several advantages over metal electric heaters, including increased durability, less susceptibility to corrosion and easier installation. Furthermore, SiC material has low thermal expansion which makes it possible for it to withstand higher temperatures without breaking.

SiC is widely utilized within the chemical industry and metal heat treating, including annealing, hardening and tempering processes. Furthermore, SiC kilns used for ceramic and glass production use SiC for its rigidity, low thermal expansion rate, high hardness properties that enable it to withstand their harsh environments.

MHI’s Silicon Carbide elements are treated with their NoAgeTM technology to ensure long-term reliability. Custom sizes and configurations are also available; power legs can also be welded onto elements using this unique technology without fear of reacting with hazardous gases such as hydrogen (H2) or oxygen (O2). Thus they’re perfectly safe for use in O2 or high vacuum environments.

Anvendelser

Silicon carbide is an incredible refractory material used for creating various products. Naturally occurring as the gemstone moissanite and synthetically produced, silicon carbide compounds are both hard and durable – perfect for industrial furnaces as they resist corrosion and oxidation.

Silicon carbide heating elements are often employed in metal heat treatment processes, including annealing and tempering, ceramic heating applications, glass heating applications and glass melting applications. Furthermore, their ability to withstand high temperatures makes them simple installations and maintenance tasks.

Silicon carbide comes in various forms, from solid rods to tubular elements. Its use in high-temperature electric furnaces as well as process environments like reducing, can be horizontally or vertically mounted for easy integration into various furnaces – however its resistance varies with temperature and time.

Manufacturers

Silicon carbide heating elements are non-metallic high temperature electric furnace elements made of high quality green silicon carbide as the main material and silicided under high temperature for silicided. This kind of element features high application temperatures, corrosion and anti-oxidation resistance as well as low power consumption for long service life.

Heating furnaces such as sintering furnaces, brazing furnaces, ceramic firing, float glass production and melting non-ferrous metals require them for various processes. Furthermore, these elements are suitable for hot pressing carbon composites, ceramics or any other heat sensitive materials.

Heating elements from MHI provide the perfect combination of high temperature resistance, easy handling, long service life, and nonlinear temperature resistance variation when designing furnaces. Their resistance also varies nonlinearly with temperature, making design considerations crucial when using them; MHI’s NoAge conditioning treatment stabilizes resistance while in use.

Price

Silicon carbide is an exceptionally hard, synthetically produced crystalline compound of silicon and carbon. While traditionally it was used for sandpaper and cutting tools, more recently it has become an increasingly popular choice for industrial furnace heating elements able to withstand extreme temperatures – these can come in all sorts of shapes and sizes!

SiC electric elements oxidize over time, increasing resistance by several orders of magnitude, necessitating their replacement. To ensure sufficient power supply for SiC heating elements it’s vital that their power source can support their required load even if resistance increases by fourfold.

SiC heating elements are self-supporting, making them suitable for furnaces and kilns that would otherwise be too wide or long for metallic or MoSi2 elements to reach. Furthermore, they can handle higher operating temperatures and wattages than their metallic counterparts, and are relatively easy to change when the furnace is still hot.