1, Heater: the main heating components in the thermal field, there are side heaters, at the top of the heater, at the bottom of the heater. Its shape and resistance to thermal field of the heating area and heating ability. 2, Graphite side panel, floor: original thermal field of the main absorption of heat, its quality directly decided to ingot casting effect and energy consumption; Its another role is under the high temperature of crucible is the main support body. 3, Crucible CC plate: its role is to prevent the hot field of ash into the crucible internal silicone fluid, due to the top heater and lateral heaters and evaporation of the liquid silicon, request the material should not only have high temperature resistance, and corrosion resistance. So the quality of the material directly determine the stand or fall of thermal field. 4, The DS graphite heat conduction block: crucible and the main carrier of silicon material, its thermal conductivity is directly determine silicon liquid solidification speed, generally require higher thermal conductivity, heat fast, namely silicon material can rapidly melting, heat faster, silicon fluid can be quickly solidified. 5, Thermal insulation material: maintain the regional balance of heat, make the whole thermal field to achieve the requirements of the temperature gradient, promote silicon melting and solidification.