Silicon carbide ceramics are advanced materials primarily composed of silicon carbide (SiC), offering outstanding mechanical properties both at room temperature and under high-temperature conditions. These include high flexural strength, exceptional oxidation resistance, excellent corrosion resistance, notable wear resistance, and a low friction coefficient. Notably, this material retains its high-temperature strength up to 1600 °C, which represents the highest level of thermal mechanical stability among known ceramic materials.
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Below is an overview of the key characteristics and application areas of silicon carbide ceramics.
(1) Properties
Among carbide-based ceramics, silicon carbide exhibits superior oxidation resistance. However, within the temperature range of 1000 °C to 1140 °C, its oxidation rate in air increases significantly. Additionally, silicon carbide is susceptible to decomposition when exposed to molten alkalis.
These ceramics also demonstrate high chemical stability, combined with considerable mechanical strength and excellent thermal shock resistance.
The electrical volume resistivity of silicon carbide remains relatively stable across temperatures ranging from 1000 °C to 1500 °C. This property makes it suitable for use in resistive heating elements. Silicon carbide heating resistors are also referred to as thermistors or semiconductor resistors. It is important to note that the resistivity of different types of silicon carbide thermistors varies with temperature.
(2) Application
Silicon carbide ceramics are widely used in various industrial fields, and their uses are as follows:
| Industrial | Working environment | Application | Principal advantage |
| oil industry | High temperature, high hydraulic pressure, and grinding | Nozzles, bearings, seals, valves
|
wear-resisting |
| chemical industry | strong acid, strong alkali | Seals, bearings, pump parts, heat exchangers
|
Wear resistance, corrosion resistance, air tightness |
| high temperature oxidation | Gasification pipeline, thermocouple sleeve | High temperature corrosion resistance | |
| Cars & Planes | Engine combustion | Burner components, turbocharger rotor | Low friction, high strength, low inertial load |
| Cars & Engines | engine oil | Valve series element | Low friction, wear resistance |
| Machinery, Mining | grinding | Borax nozzle, lining, and pump parts | wear-resisting |
| paper industry | pulp, waste liquid | Seal, casing, bearing, forming plate | Wear resistance, corrosion resistance, and low friction |
| heat treatment smelting steel | high-temperature gas | Thermocouple bushing, radiation tube, heat exchanger, combustion element | Wear resistance, corrosion resistance, air tightness |
For many years, INNOVA Supplies has specialized in delivering tailored ceramic material solutions to its clients. Our services include, but are not limited to, the custom manufacturing of silicon carbide ceramic components. Should you have any requirements, please do not hesitate to reach out to us.
