The classification of metallic silicon is usually based on the content of iron, aluminum and calcium, the three main impurities contained in the metallic silicon components.According to the content of iron, aluminum and calcium in metallic silicon, metallic silicon can be divided into 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101 and other different grades

Conductivity: The conductivity of silicon has a great relationship with its temperature. With the rise of temperature, the conductivity increases, reaching its maximum at about 1480℃, and decreases with the rise of temperature when the temperature exceeds 1600℃