Silicon Carbide Ceramic (SiC)
Silicon carbide (SiC), also known as corundum, was initially used in the machining industry due to its superhard properties. It was prepared into various grinding wheels, emery cloths, sandpapers, and various abrasives for grinding. The biggest feature of silicon carbide is its high-temperature strength. The strength of ordinary ceramic materials will be significantly reduced at 1200 ~ 1400 degrees Celsius, while the bending strength of silicon carbide at 1400 degrees Celsius remains at a high level of 500 ~ 600MPa, so its operating temperature can reach 1600 ~ 1700 degrees Celsius. In addition, the thermal conductivity of silicon carbide ceramics is also high, so silicon carbide ceramics have been widely used in high-temperature bearings, bulletproof plates, nozzles, high-temperature corrosion-resistant components, and high-temperature and high-frequency electronic equipment parts and components.
Edgetech Industries, Advanced Ceramics Division, is a leading supplier of ceramic materials. We provide high-purity silicon carbide ceramic products at competitive prices.
Silicon Carbide Properties
-High hardness, Mohs hardness rating of 9
-High-temperature strength, can maintain its strength at temperatures up to 1400°C
-High thermal conductivity
-Resistance to chemical reaction
-Chemically and physically stable, with corrosion resistance
-Its electrical conductivity is between that of metals and insulating materials
Silicon Carbide Applications
Based on the above properties, silicon carbide ceramic products are used as
– A promising substitute for traditional semiconductors such as silicon in high-temperature applications.
-Grinding wheels, abrasive paper, and cloth products
-High-temperature bricks and other refractories
-Abrasive and cutting tools
-Structural material
-Automobile parts
-Electronic circuit elements
-Thin filament pyrometry
-Catalyst support
Silicon Carbide Products
Sintering Methods for Silicon Carbide
We mainly provide reaction-sintered silicon carbide (RBSiC), pressureless-sintered silicon carbide (SSiC), and recrystallized silicon carbide (RSiC) ceramic products.
The advantages of RBSiC are low sintering temperature, low production cost, and high material densification degree. In particular, the volume shrinkage during reaction sintering is very small, which is particularly suitable for the preparation of large-sized and complex-shaped structural parts. High-temperature kiln furniture, radiation tubes, cold air ducts, nozzles, etc., are typical applications of RBSiC ceramics.
SSiC densifies silicon carbide powder through a high-temperature sintering process without applying additional pressure, and the shrinkage rate of SSiC products is relatively large.
The density, flexural strength, and compressive strength of RBSiC are lower than those of SSiC products, and the maximum operating temperature of RBSiC ceramic products is 1380℃, which is lower than the temperature resistance of SSiC products at 1600℃. SSiC products are more resistant to strong acid and alkali corrosion than reaction-sintered silicon carbide products.
RSiC has a high sintering temperature (2100~2300 ℃), is resistant to high temperatures, and its maximum operating temperature can reach 1650 degrees. The product is loose inside, has high porosity, has a higher thermal expansion coefficient than reactive/pressureless sintered silicon carbide, and has excellent high-temperature resistance and thermal shock resistance.
We provide SiC ceramic rods, tubes, sheets, plates, discs, and customized parts. Other ceramics include Hot-pressed Boron Nitride (HBN), Pyrolytic Boron Nitride (PBN), Silicon Nitride (Si3N4), Aluminum Nitride (AlN), Zirconia (ZrO2), Alumina (Al2O3), Lanthanum Hexaboride (LaB6), Cerium Boride (CeB6), Silicon Carbide (SiC), Boron Carbide (B4C), etc. Customized and complex ceramic parts are available on request.