Silicon Carbide (SiC) is an artificially synthesized superhard material produced by reacting quartz sand and petroleum coke in a high-temperature resistance furnace above 2000°C. With a primary chemical composition of SiC and Mohs hardness of 9.2-9.5 (second only to diamond and cubic boron nitride), it exhibits exceptional hardness, high thermal conductivity (120-270 W/m·K), heat resistance (1600℃), and excellent chemical stability. SiC crystals are commonly found in black and green varieties, with the green type having higher purity for precision applications.

Key industrial applications include:

• Grinding & Polishing: Precision processing of hard/brittle materials like cemented carbide, ceramics, and optical glass
• Refractories: High-temperature kiln furniture, refractory bricks, and castables for metallurgy
• Semiconductors: As a wide-bandgap semiconductor for high-temperature, high-frequency, and high-power electronic devices
• Ballistic Armor: Lightweight composite armor materials utilizing its extreme hardness

Due to its outstanding comprehensive properties, SiC is widely used in high-tech fields including mechanical manufacturing, aerospace, new energy, and defense industries, making it an indispensable material for modern industry.

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