Carbeto de silício recristalizado

Silicon carbide is an extremely hard ceramic that possesses superior temperature stability and corrosion resistance, making it widely utilized across chemical, metallurgy and wear-resistant industries.

RSiC is produced via an evaporation-coagulation process at high temperature and boasts open porosities ranging from 11-15%, large grains sizes and no shrinkage during its firing process.

High Porosity

Recrystallized silicon carbide differs from many porous ceramics in that it does not shrink during firing, enabling larger parts to be created at lower energy costs and in shorter production cycles. Furthermore, this material can withstand thermal shock as well as high temperatures without damage to its structures.

Pore size and microstructure play an integral part in determining the electrical resistivity of porous silicon carbide. By altering sintering temperature and CIP pressure settings, pore sizes can be tailored specifically for certain applications while chemical composition adjustments allow you to alter its porosity accordingly.

Pore sizes can also be controlled through second-phase additives like oxides or silicides. By manipulating factors that influence electrical resistivity in porous silicon carbide, new and exciting applications may emerge across many fields.

Alta resistência

Recrystallized silicon carbide ceramics feature an advanced microstructure which gives them exceptional mechanical, thermal and electrical properties at all temperatures, including dimension stability, corrosion resistance and strength even at extreme heat levels. Due to these properties RSiC ceramics make an excellent choice for use as kiln furniture (such as tunnel, shuttle and double roller kilns) or even armor plates against ballistic missile attacks.

Silicate-bonded silicon carbide (SiC), produced from coarse and medium grain SiC powder sintered with 5-15% aluminosilicate binder, lacks homogeneous structure and superior flexural strength; additionally it displays superior oxidation resistance. In comparison, RSiC features more homogenous structure with greater flexural strength as well as increased oxidation resistance.

RSiC is produced through an evaporation-condensation process that creates more pure, denser material than standard powder sintering processes, meaning less metallic silicon is required to fill its pores, thus decreasing risk of cracking during sintering while providing more accurate part geometry due to no shrinkage during infiltration.

High Thermal Stability

Silicon carbide boasts superior chemical stability and thermal shock resistance, with low coefficient of expansion. It can withstand temperatures up to 2,200 deg C. Due to this high temperature stability, silicon carbide makes an excellent material choice for power generation applications such as nuclear reactors or solar power plants.

Reaction sintering is one of the most widely-used methods of ceramic production, mixing silicon and carbon atoms together into powdered silica to form ceramic material with diamond-hard properties and compact structures that produce various shaped parts.

CoorsTek, Saint-Gobain Ceramic Materials, ESK-SIC GmbH and Fiven are among the market leaders for recrystallized silicon carbide manufacturing, with each having long histories within their industries and strong focus on innovation. While their exact sales figures may not be available publicly, these firms maintain significant market presences and appear well-placed to experience continued expansion into the future.

High Corrosion Resistance

Silicon carbide boasts outstanding corrosion resistance due to its natural material structure of interlocking plate-like grains which run perpendicularly along its surface. Furthermore, its unique microstructure offers unsurpassed erosion/abrasion/thermal shock resistance as well as dimensional stability at higher temperatures; making it the ideal material for producing kiln furniture and other high-temperature applications in industry.

Recrystallized silicon carbide can be formed using slip casting, extrusion and injection molding processes to produce material with superior strength at very high temperatures. Its strength makes it particularly suitable for construction of carrying structure frames in tunnel kilns, shuttle kilns and down-fired kilns as it allows it to withstand very high temperatures while improving oxidation resistance of kiln lining and decreasing energy consumption.

Recrystallized silicon carbide also offers great potential for producing metal-reinforced ceramics, providing an efficient means of combining metals and ceramics in advanced technical components used for solar power towers.