silicon carbide

Basic Introduction to Silicon Carbide (SiC)

Chemical and Physical Properties

With the chemical formula of SiC, it is made from raw materials such as quartz sand and petroleum coke through high-temperature smelting. It is a representative of the third-generation semiconductor materials. It has characteristics such as high breakdown field strength (high voltage resistance), high thermal conductivity (fast heat dissipation), and high electron saturation drift velocity (excellent high-frequency performance), making it suitable for extreme environments. It is rare in nature and mainly exists in the form of synthetically produced moissanite.

Structure and Crystal Forms

There are multiple crystal forms, such as 3C, 4H, 6H, 15R, etc., with significant differences in physical properties among different crystal forms. β-SiC (cubic system) is predominant at low temperatures (<1 600°C), and it can transform into α-SiC (hexagonal or rhombic system) at high temperatures.

Characteristics of Silicon Carbide

Silicon carbide is characterized by resistance to extreme environments, high performance, and long lifespan. Silicon carbide is a core material of third-generation semiconductors and continues to drive technological innovations in fields such as new energy, aerospace, and advanced manufacturing.

application area

Semiconductors and Electronics: Power devices (IGBT), high-frequency communications, smart grids.

Industry and Energy: Photovoltaic inverters, hydrogen energy catalyst carriers, high-temperature heat exchangers.

National Defense and Aerospace: High-temperature resistant coatings, armor materials, aerospace propulsion systems.

Environmental Protection and Chemical Engineering: Corrosion-resistant piping, nuclear reactor linings.