Silicon- aluminium alloy is of gray metallic luster as metallic base thermal material. High silicon-aluminum alloy material can maintain the excellent properties of silicon and aluminum, and the content of silicon and aluminium is very rich. The silicon powder technology is mature and cheap without pollution or harm to human body. Melting point:1500℃, density: 2.7g/cm3, and thermal expansion coefficient (CTE): 7-20ppm/℃, purity: 99.9% - 99.999%. It is manufactured through vacuum melting furnace, vacuum sintering furnace, hot isostatic pressing, hot pressing furnace, precise mechanical processing. It is widely used in alloy materials for aerospace, automobile parts, space technology and portable electronic devices.