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Silicon carbide (SiC) ceramic materials have become an irreplaceable key material in modern industry due to their unique physical and chemical properties. Compared with traditional metal or oxide ceramics, silicon carbide products show significant advantages under extreme working conditions such as high temperature, corrosion, and wear, promoting technological upgrades in multiple industries.
1. Excellent high temperature resistance
The melting point of silicon carbide is as high as 2700℃. It can still maintain high strength in a high temperature environment above 1600℃, and its oxidation resistance is far superior to that of ordinary ceramics. For example, silicon carbide rollers and beams can withstand high temperatures above 1400℃ for a long time in ceramic kilns, avoiding deformation and cracking, and significantly extending the life of the equipment.
2. Super strong wear resistance and corrosion resistance
Silicon carbide is second only to diamond in hardness and has a wear resistance more than 10 times that of steel. It is also resistant to acid, alkali, and molten metal corrosion. Silicon carbide seals and nozzles in the chemical industry can work stably in strong acid, strong alkali, or high-salt environments, reducing downtime maintenance costs.
3. Excellent thermal conductivity and thermal shock resistance
Silicon carbide has high thermal conductivity (about 120 W/m·K), which can quickly transfer heat and resist rapid cooling and heating shock. For example, silicon carbide cold air pipes can effectively cool down the rapid cooling section of ceramic kilns to avoid cracking due to thermal stress.
4. Lightweight and energy-saving potential
Silicon carbide has a low density (3.1 g/cm³) and is lighter than steel, yet stronger. In the aerospace sector, silicon carbide components can reduce the weight of equipment; in industrial furnaces, its low heat mass can also reduce energy consumption.
5. Wide application adaptability
From traditional ceramic metallurgy to emerging semiconductor and new energy fields, silicon carbide products can be used in all fields. For example, photovoltaic silicon wafer sintering furnaces rely on the high temperature stability of silicon carbide cantilever paddles, while semiconductor equipment utilizes its high purity and resistance to plasma erosion.
Conclusion
The comprehensive performance advantages of silicon carbide products make it an ideal choice for high temperature, corrosive and high wear environments. As industrial technology develops towards high efficiency and greenness, the application scenarios of silicon carbide will be further expanded, providing key material support for industrial upgrading.