Silicon Carbide Ceramic

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Silicon carbide (SiC), also known as corundum, was originally used in the mechanical processing industry due to its superhard properties. It was made into various grinding wheels, emery cloths, sandpapers and various abrasives for grinding. Silicon carbide ceramics also have a high thermal conductivity, so silicon carbide ceramics have been widely used in high-temperature bearings, bulletproof plates, nozzles, high-temperature corrosion-resistant components, high-temperature and high-frequency electronic equipment components, etc.

We mainly provide reaction-sintered silicon carbide, pressureless sintered silicon carbide and recrystallized silicon carbide ceramic products.

The advantages of reaction-sintered silicon carbide are low sintering temperature, low production cost, and high degree of material densification. 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 materials, radiant tubes, heat exchangers, desulfurization nozzles, etc. are all typical applications of reaction-sintered silicon carbide ceramics.

Pressureless sintered silicon carbide is to densify silicon carbide powder through a high-temperature sintering process without applying additional pressure. The shrinkage rate of pressureless sintered products is relatively large.

The density, bending strength and compressive strength of reaction-sintered silicon carbide are lower than those of pressureless-sintered silicon carbide products, and the maximum operating temperature of reaction-sintered silicon carbide ceramic products is 1380°C, which is lower than the temperature resistance of pressureless-sintered silicon carbide products at 1600°C. Pressureless-sintered silicon carbide products are more resistant to strong acid and alkali corrosion than reaction-sintered silicon carbide products.

Recrystallized silicon carbide has a high sintering temperature (2100-2300°C), is resistant to high temperatures, and has a maximum operating temperature of 1650 degrees. The product is loose inside, has a high porosity, and has a higher thermal expansion coefficient than reaction/pressureless-sintered silicon carbide, with excellent high temperature resistance and thermal shock resistance.

Silicon Carbide Properties
-High hardness, Mohs hardness level 9
-High high temperature strength, can maintain its strength at temperatures up to 1400℃
-High thermal conductivity
-Resistant to chemical reactions
-Stable chemical and physical properties, corrosion resistance
-Its electrical conductivity is between metals and insulating materials

Applications of Silicon Carbide
-Potential to replace traditional semiconductors such as silicon in high temperature applications
-Grinding wheels and sandpaper and cloth products
-High temperature bricks and other refractory materials
-Abrasives and cutting tools
-Structural materials
-Automotive parts
-Electronic circuit components
-Filament pyrometers
-Catalyst carriers

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.

Edgetech Industries Advanced Ceramics pision is a leading supplier in the field of ceramic materials. We provide high-purity silicon carbide ceramic products at competitive prices, including SiC ceramic rods, tubes, sheets, plates, discs and customized parts.