Why Recrystallized Silicon Carbide Is the Best Refractory Material for High Temperature Applications

Silicon carbide is an exceptional ceramic material commonly utilized for applications requiring high temperature applications, due to its strength, corrosion resistance, and thermal conductivity properties.

Recrystallized silicon carbide is produced through evaporation and coagulation processes and features an open porosity of 11%-15%, making heating easy with minimal shrinkage; thus eliminating many of the drawbacks associated with other production methods.


Natural moissanite can only be found in trace amounts in meteorites, corundum or kimberlite deposits; all commercial SiC sold worldwide is synthetically manufactured using pure silicon and carbon fused at extremely high temperatures by electric currents in an electric furnace.

Silicon carbide ceramic has an extremely low coefficient of expansion, making it suitable for handling temperature changes without cracking or breaking. Furthermore, this material boasts excellent flexural strength and fracture toughness – meaning that it can withstand stresses that could break other materials apart.

Due to its unique combination of thermal, mechanical and chemical properties, RSiC is utilized in numerous applications across industries. It can be found in furniture for kilns and gas burners; diesel particulate filters; thermal exchangers and thermal shielding vests – where its high impact resistance allows it to perform admirably as bulletproofing material.

Cemented carbides (CCEs), made of RSiC combined with metals, provide greater specific strength and elastic modulus than pure crystalline SiC. Saint-Gobain Performance Ceramics & Refractories produces Hexoloy, which is an advanced composite of RSiC and aluminium used to manufacture lightweight armor plates designed to withstand current and emerging ballistic threats.

Thermal Conductivity

Recrystallized silicon carbide’s excellent thermal conductivity makes it an excellent refractory material to use at extremely high temperatures, with ten times greater thermal conductivity than fireclay refractories and can be formed into complex shapes with ease. Furthermore, its resistance to corrosion and slag attack makes it highly reliable against attack from slag attack; additionally nitride-bonded silicon carbide offers even greater thermal shock resistance and oxidation resistance than oxide-bonded versions.

Recrystallized silicon carbide stands out as an invaluable material used in advanced technologies across the globe due to its combination of properties. From energy efficient LEDs and lasers, to automobiles and kilns; wherever high performance materials are necessary. Recrystallized silicon carbide plays a central role in these applications.

Duratec recrystallized silicon carbide beam offers superior temperature strength, light weight, high thermal conductivity, low heat retention rates and long service life. Support frames for structure frames in tunnel kilns, shuttle kilns, double roller kilns and other high-temperature kilns can significantly increase qualified rate of product firing rates while conserving energy resources. Porcelain, glass ceramics, metallurgy and refractory industries all can utilize it. Hollow beams, shed boards or special-shaped parts may also be created from it. RSiC boasts the ability to be bent or deformed without breaking or losing shape, withstanding temperatures up to 1620degC without succumbing to damage or cracking, making it an excellent choice as kiln furniture for high voltage electric porcelain, sanitary porcelain and glass ceramics.

Resistance to Corrosion

Recrystallized silicon carbide is an extremely durable material with excellent corrosion resistance due to its crystalline structure incorporating a layer of passive oxide which protects it from acids, alkalis and solvents which may attack it chemically. As such, recrystallized silicon carbide makes an excellent choice for applications like oil refinement and chemical processing which involve exposure to these substances on an everyday basis.

Recrystallized silicon carbide boasts superior mechanical properties as well as exceptional heat tolerance, meaning it can endure extremely high temperatures for extended periods without losing its integrity or structural integrity. As such, recrystallized silicon carbide has found applications in aerospace and military equipment such as rockets, satellites and missiles where its heat tolerance helps improve performance while prolonging equipment lifespan. Furthermore, recrystallized silicon carbide can also be used in vehicles’ nozzles and valves which withstand projectiles such as bullets or missiles.

Hexoloy offers an assortment of sintered and recrystallized silicon carbide (SSiC and RSiC) products to meet your exact specifications, such as different sizes, lengths and wall thicknesses suitable for various refractory applications. Silicon carbide and silicon nitride both offer excellent protection from extreme temperatures, abrasive environments, direct flame impingement and other forms of damage. Furthermore, these materials possess outstanding oxidation and erosion resistance properties to extend their lives in harsh environments as well as rapid cooling and thermal shock shock resistance. Furthermore, significant progress has been made in understanding their corrosion properties, with models now available that help engineers design for optimal performance in complex environments.

Electrical Insulation

R-SiC features a crystalline matrix which helps it retain strength at high temperatures, with low thermal expansion coefficient to minimize shock and cracking risks. Thus, making it ideal for industrial applications that involve high operating temperatures.

RSiC stands out as an essential material in many high-tech industries due to its unique combination of thermal, mechanical and chemical properties. It has become one of the world’s most reliable materials with unsurpassed performance which continues to inspire innovations.

Silicon carbide ceramics can be produced using several techniques, including slip casting, extrusion and injection molding. Once produced, RSiC is sintered in a furnace at high temperatures to cause it to recrystallize and create its distinctive microstructure while simultaneously dispensing with any binder material leaving only pure RSiC as its outcome.

semiconductors differ from conductors by permitting electric currents and electromagnetic fields to regulate their conductivity, enabling the construction of electronic devices that amplify, switch or convert signals in an electrical circuit. SiC semiconductors in particular exhibit higher electron mobility at elevated temperatures while experiencing less power loss at these same temperatures, making them the go-to material for Schottky diodes, transistors and FETs/MOSFETs.

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