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Silicon Carbide (SiC)

Silicon carbide (SiC) is a crystal material formed by the stable combination of carbon and silicon elements. Its unique crystal structure gives it a range of excellent physical and chemical properties, such as outstanding high-temperature stability, extreme hardness, and excellent corrosion resistance. These advantages make SiC highly valuable in various high-tech fields.

In the energy sector, SiC is often used in high-temperature and high-pressure environments, such as in nuclear reactor components and high-efficiency battery systems. Its high-temperature stability allows it to maintain good performance under extreme conditions. SiC, as a wide-bandgap semiconductor material, offers excellent electrical conductivity and high-temperature resistance in electronics and semiconductors. It is widely used in high-power and high-frequency electronic devices, such as in electric vehicles, power electronics, and solar inverters.

Additionally, SiC plays an important role in ceramics and coatings. Due to its excellent wear resistance and high-temperature performance, it is widely applied in mechanical components, cutting tools, ceramic materials, and protective coatings. Whether in industrial manufacturing, electronic devices, or energy systems, the outstanding properties of SiC make it an indispensable material in many key technological fields.

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Silicon Carbide (SiC) Applications

Electronics and Semiconductors
SiC is an essential material for advanced semiconductors designed to operate under high temperatures, high voltages, and high frequencies. These devices are widely used in power conversion systems, as well as in hybrid and electric vehicles, and next-generation communication equipment.

Abrasives and Cutting Tools
With exceptional hardness and wear resistance, SiC is widely employed in grinding wheels, sandpapers, and precision cutting tools. It enables efficient machining of metals, ceramics, and composites that conventional abrasives cannot handle.

High-Temperature Equipment
SiC’s ability to endure extreme thermal cycling makes it ideal for industrial furnaces, heating rods, and kiln components. It ensures durability and efficiency in demanding processes such as glass production, metallurgy, and ceramic sintering.

Automotive Industry
In automotive engineering, SiC enhances performance in brake systems, clutches, and engine parts. Its thermal stability and mechanical strength contribute to improved safety, reduced wear, and higher efficiency in modern vehicles.

Aerospace and Defense
SiC is valued in aerospace and defense for lightweight armor plating and ballistic protection. Its high hardness, combined with low density, provides effective shielding against impact while minimizing additional weight.

Energy and Renewables
In clean energy technologies, SiC supports higher energy conversion efficiency. It is used in solar inverters, high-brightness LEDs, and power electronics, helping reduce energy losses and boost overall system reliability.

Ceramic Matrix Composites
As a reinforcement in CMCs, SiC delivers outstanding strength and thermal resistance. These composites are critical for turbine blades, jet engines, and other high-performance systems where metals fall short.

Nuclear Applications
SiC is under active development for nuclear technology, serving as a candidate material for reactor fuel cladding and waste containment. Its resistance to radiation and excellent thermal conductivity make it a promising solution for safer, more efficient nuclear systems.

Silicon Carbide (SiC)

Properties
Chemical FormulaSiC
Mechanical
Density3.22 g/cm3
Hardness9.2 Mohs
Modulus of Elasticity410 GPa
Flexural Strength550 MPa
Compressive Strength3.0 GPa
Poisson’s Ratio0.14
Fracture Toughness3.0 MPa·m¹/²
Electrical
Dielectric Strength3.0 x 106 V/cm
Dielectric Constant9.7 (@ 1 MHz)
Volume Resistivity104 – 106 ohm·cm
Thermal
Coefficient of Thermal Expansion4.0 x 10^-6 /°C
Thermal Conductivity120-270 W/(m*K)
Specific Heat0.69 J/g·K
Shock Resistance
Maximum Working Temperature1650 °C

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