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The Six Major Advantages of Atmospheric-Pressure Sintered Silicon Carbide and Applications of Silicon Carbide Ceramics
Release time:
2022-01-24
Atmospheric-pressure sintered silicon carbide Silicon carbide is no longer used merely as an abrasive; rather, it’s increasingly being employed as a new type of material and is widely incorporated into high-tech products—such as ceramics made from silicon carbide. So, what are the six major advantages of atmospheric-pressure sintered silicon carbide, and what are the applications of silicon carbide ceramics? Let’s dive into the details now.
Atmospheric-pressure sintered silicon carbide The six major advantages of the material:
1. Low density
Silicon carbide has a lower density than metals, making the device lighter.
2. Corrosion resistance
Silicon carbide materials boast a high melting point, chemical inertness, and resistance to thermal shock. Silicon carbide is used in abrasives, ceramic kilns, and as a raw material for silicon carbide products. It can also be employed in vertical cylindrical distillation furnaces for smelting and metallurgical industries, as well as in bricks, linings for aluminum electrolytic cells, tungsten production, small furnaces, and other silicon carbide ceramic products.
3. High temperature, reduced thermal expansion coefficient
Silicon carbide materials are manufactured at high temperatures. In certain high-temperature environments, there is a need for materials that can achieve the same machining strength and machining accuracy as silicon carbide ceramics. The melting point of silicon carbide is around 800°C, whereas that of steel is only about 250°C. Roughly speaking, the average coefficient of thermal expansion of silicon carbide over the temperature range from 25°C to 1400°C is 4.4 × 10⁻⁶/°C. Measurements of silicon carbide’s coefficient of thermal expansion have shown that this value is significantly lower than that of other abrasive materials and high-temperature materials. Pressureless-sintered silicon carbide.
4. High thermal conductivity
Silicon carbide boasts a high thermal conductivity, which is another important physical characteristic of this material. The thermal conductivity of silicon carbide is significantly higher than that of other refractory materials and abrasives—about four times greater than that of corundum. Silicon carbide has a low coefficient of thermal expansion and high thermal conductivity, which means that workpieces subjected to heating and cooling experience less thermal stress. This is precisely why SiC components exhibit exceptional resistance to thermal shock.
5. High mechanical strength and good rigidity
Silicon carbide material has high mechanical strength, which helps prevent deformation of the material. The mechanical strength of silicon carbide is higher than that of corundum.
6. High hardness and wear resistance
Silicon carbide materials exhibit very high hardness; their Mohs hardness ranges from 9.2 to 9.6, second only to diamond and tungsten carbide. Compared to metallic steel materials, silicon carbide offers high hardness, a low coefficient of friction, relatively low wear, minimal surface roughness, and excellent wear resistance—especially under non-lubricated conditions. Furthermore, it demonstrates strong resistance to external substances, enhancing the durability of its surface. Atmospheric-pressure sintered silicon carbide.
Applications of Normal-Pressure Sintered Silicon Carbide Ceramics
1. Special ceramics for silicon carbide material production
Silicon carbide is a material characterized by high hardness and low cost, making it suitable for producing silicon carbide products such as silicon carbide seals, silicon carbide sleeves, silicon carbide bulletproof plates, and silicon carbide profiles. These products can be applied in mechanical seals and various types of pumps. Atmospheric-pressure sintered silicon carbide.
2. Special ceramics for zirconia material production
Zirconia ceramics exhibit high ionic conductivity, excellent chemical stability, and structural stability, making them a widely studied and extensively applied electrolyte material. Improving the fabrication processes for zirconia-based electrolyte thin films to lower their operating temperatures and reduce manufacturing costs, thereby paving the way for industrial-scale production, is also an important research direction for the future.
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