Silicon carbide ceramic rod is a non-metal high temperature electric heating element made of high-purity green hexagonal silicon carbide raw material by recrystallization and sintering, offering benefits such as resistance to high temperatures, corrosion, fast heating speeds and small high temperature deformation. Easy installation and maintenance make this ideal choice for electric heating needs.
High Temperature Resistance
Silicon carbide, also known as carborundum, is an extremely tough material with an extremely high melting point that is resistant to corrosion, wear, and thermal shock. Used widely as welding positioning pins and kiln furniture pieces as its strength allows accurate placement at high temperatures while resisting deformation under heat unlike metals would do, silicone carbide is also found in ceramics, refractories and electrical components.
Reaction-bonded silicon carbide (RBSC), produced through the reaction between silica sand and carbon, is commonly used to make electric heating elements for kilns and other industrial applications due to its high resistance and thermal stability. Furthermore, its antiabrasive qualities make it suitable for wear parts, and its tough ceramic fibers may even outlive even conventional wear parts!
As with any equipment, silicon carbide ceramic rods need to be regularly checked and replaced when worn down or broken. When replacing broken rods it is wise to save any unbroken ones for future use in order to ensure the temperature control and functionality of equipment remain uncompromised. Doing this helps ensure proper temperature regulation as well as operational continuity of equipment.
Corrosion Resistance
Silicon carbide offers superior corrosion resistance and is highly strong, resisting high temperatures and stresses without succumbing to fracture. For these reasons, silicon carbide makes an ideal material choice for high performance materials that must withstand harsh environments.
Silicon carbide surfaces feature a protective film that deflects oxygen from gaseous and liquid environments. The composition of this protective layer varies according to environmental conditions, as well as thermal and mechanical properties of ceramic material.
Oxide bonded silicon carbide offers excellent erosion and corrosion resistance. It comes in various shapes and sizes, while its strength surpasses that of most nitride bonded silicon carbides, enabling Blasch to manufacture low mass kiln furniture suitable for tunnel kilns, roller kilns, glass kilns and other equipment used for processing raw materials.
Silicon carbide rods are essential components of extensometers used to measure deformation during stress tests due to their rigidity, low creep rate and thermal stability – qualities which help ensure accurate data in stressful testing situations. Silicon carbide also possesses excellent high temperature strength characteristics as well as resistance against creep and thermal shock which make it an invaluable material for static hot sections found on rockets, airplanes, and car engines.
Good Wear Resistance
Silicon carbide boasts a Mohs hardness of nine, giving it superior wear resistance compared to many other materials used for insulation in high temperature environments. Furthermore, its thermal conductivity adds longevity while its low friction coefficient reduces sliding wear significantly. This makes silicon carbide an excellent material choice when designing insulation rods to withstand such environments.
Silicon carbide ceramic stands out as an invaluable material in metal processing due to its superior resistance against oxidation, wear and high strength – qualities which make it the go-to material. Thanks to its excellent mechanical properties it makes an ideal material choice for applications in furnace bellows, open iron taps and enameling furnaces; plus muffle kilns, shed boards and push boards.
Mascera produces industrial silicon carbide in two forms: sintered silicon carbide (SSiC) and reaction bonded silicon carbide (RBSiC). The former is composed of pure sic powder mixed with non-oxide sintering additives and sintered under pressure at high temperature; RBSiC is an electric heating element tubular in shape which has become widely utilized across national defense, machinery, metallurgy, light chemical industry, ceramics semiconductors as well as analysis testing and scientific research applications as heating elements of tunnel kilns roller kilns roller kilns roller kilns glass kilns or various electric furnaces.
Good Thermal Stability
Silicon carbide is an extremely strong ceramic with excellent properties for use in industrial furnaces and other electric heating equipment, including high temperature ovens. It boasts second only to diamond in terms of hardness while offering low thermal expansion rates, chemical stability and corrosion resistance properties.
Silicon carbide ceramic is highly valued as a substrate material for manufacturing high-grade kilns and furnaces, as it features excellent thermal conductivity properties. Furthermore, silicone carbide has many other applications within magnetic materials processing, powder metallurgy, glass production, refractories manufacturing, electronics and refractories manufacturing industries.
Silicon carbide heating elements offer superior electrical resistance stability across a range of temperatures when compared with metal electric heating elements like nichrome or Kanthal, which makes them particularly suitable for heating reducing or other process atmospheres.
Pressureless Sintering
Traditional reaction sintering processes make it challenging to produce large and complex silicon carbide ceramic rods of large size and complex shape, due to low sintering temperature, high material requirements, and difficulty in reaching uniform density of sintered products. Furthermore, cracking may occur and it does not have sufficient fracture toughness.
Pressureless sintering method is better suited to producing silicon carbide ceramic rod because it requires lower sintering temperatures and shorter sintering times, is easy to control the chemical composition of powder, and has similar densification performance as reactive sintering.
This preparation process uses extrusion processing to create a dense green body moulding, followed by normal pressureless sintering to produce a final product with excellent wear, corrosion, and high temperature resistance. Vickers hardness of sintered silicon carbide ceramics has reached 22 GPa while elastic modulus has reached 460 MPa – making this an excellent material choice for manufacturing mechanical seals, sand blasting nozzles, bullet proof pieces etc.