Silicon carbide rod is a non-metallic high temperature heating element made from selected high quality hexagonal silicon carbide material sourced from select plants, processed into blanks and siliconized at high temperature before recrystallization.
It boasts superior high temperature resistance, oxidation resistance and corrosion resistance; with fast heating-up time and long service life. Furthermore, small high temperature deformation is experienced.
High Temperature Resistance
Silicon carbide rods offer superior high temperature resistance, capable of withstanding temperatures as high as 1625 degrees Celsius. Furthermore, these materials resist erosion from harmful gases, water vapor, and metal oxides – significantly slowing their aging speed and lengthening their lifespan, making them suitable for demanding applications that demand high durability heating elements.
Silicon carbide elements are ideal for use in vacuum and other high-pressure environments, due to its dense composition and low porosity levels that withstand these environments without experiencing damage or degradation. Furthermore, their rapid heating dispersion capabilities allow them to absorb and dissipate heat quickly for efficient energy usage and prolonged lifespans.
When replacing silicon carbide rods in bulk, rather than individually, it is advisable to do so as soon as possible in order to prevent mixing new and old rods which could result in uneven performance and increased resistance. When selecting replacement rods it must match closely in terms of resistance value.
Silicon carbide rods can be used in a wide variety of applications, from electronic products and magnetic materials to powder metallurgy, ceramics, glass, semiconductors, analytical testing and scientific research. Furthermore, these electric heating elements are frequently found in tunnel kilns, roller kilns, vacuum furnaces, muffle furnaces and smelting furnaces – perfect for general-purpose electric heating applications!
Corrosion Resistance
Silicon carbide rods are corrosion-resistant and can withstand high temperatures, making them an excellent choice for use in electric furnaces. Their corrosion-resistance makes them an excellent option when melting metals and glass for applications involving both metal melting and glass cutting, as well as their resistance to erosion from gases such as water vapor or metal oxides that accelerate aging rates and shorten lifespans of heating elements.
Heat treating elements are used for an array of heat treatment processes, from tempering and annealing glass, ceramics, and metals to processing refractory materials in industrial kilns. Plus, their chemical resistance makes them an ideal fit for chemical processing equipment.
Resistance values of silicon carbide rods vary with temperature. At room temperature, resistance levels tend to start out relatively high before dropping to their minimum at 900 degrees Celsius. Resistance ratings should be clearly displayed on each rod and it is best to select one which matches up best with your production process.
Alpha-Spiral Silicon Carbide Rod elements are self-bonded silicon carbide elements manufactured from green hexagonal silicon carbide through re-crystallization at high temperatures. Their components consist of a central hot zone with two low resistance cold ends which are joined together using welding. Their strong reaction bonding technique enables them to withstand high temperatures without cracking or breaking.
Long Lifespan
Silicon carbide rods offer greater longevity compared to their metal counterparts, thanks to their more stable structure and reduced thermal shock. Their strength and stability also allow for precise positioning within the furnace.
Silicon carbide rods typically last 1450 degC in an oxidizing atmosphere. If exposed to excessive surface load or corrosion from large loads, their lifespan could be greatly diminished; also close placement to cover plates or material liquid levels exposes them to chemical substances like sulfur, sodium and boron which hasten their aging process.
In order to increase the life of silicon carbide rods, it is advisable to reduce their surface load, keep voltage and current within acceptable levels, and avoid series-parallel connections during usage. Furthermore, unbroken silicon carbide rods that have been removed should be saved and used again with new ones (ideally by measuring voltage/current before taking action on each one, then grouping by resistance value); doing this will decrease their rate of aging since older silicon carbide rods are being reused alongside them.
Easy Installation
Silicon carbide rods are easy to install into an electric furnace, offering higher operating temperatures and watt loads than metallic elements while remaining easier to change while the furnace remains hot – all qualities which make them suitable for high temperature environments such as welding.
Silicon Carbide Heating Elements are high-temperature electric heating elements fabricated from green, high-purity hexagonal silicon carbide as their main raw material. These blanks are then sintered at 2200degC for high-temperature siliconization, recrystallization and sintering processes. Good mechanical properties and chemical stability characterize their use, which explains their widespread usage in national defense, machinery, metallurgy, light industry, ceramics, glass and semiconductor semiconductor analysis and testing and scientific research applications as an electric heating element in tunnel kilns, roller kilns, glass kilns vacuum furnaces muffle furnaces smelting furnaces among other electrical heating equipment.
Before installing silicon carbide rods, it is advisable to first test the voltage and current of an electric furnace. Preheat for 20-40 minutes with 30%-40% of design power at 30%-40% of design power; gradually increase power until desired temperature is reached; this way you will reach your rated power and extend lifespan of silicon carbide rods. Likewise, its wiring must have close contact with white aluminum head at cold end in order to prevent sparking during power delivery.
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