Quartz Sands -
Quartzite
MG-SI
Polysilicon
Ingots
Wafers
Cells
Solar
Modules
Installation,
PV Power
Generation
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MG-SI
Metallurgical grade silicon (MG-Si) is used to make solar grade polysilicon. The MG-SI is prepared by combining silicon with wood, charcoal and coal, in an electric arc furnace using carbon electrodes. At temperatures over 1,900 °C (3,450 °F), the carbon reduces the silica to liquid silicon which collects in the bottom of the furnace, and is then drained and cooled to form MG-Si.
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Wafers
Monocrystalline and mutlicrystalline ingots are often reshaped according to their desired usage before being sliced by a wire saw into ultrathin wafers. Wafers then have other chemicals added to enhance their efficiency in a process called doping, and are then cleaned to remove any unwanted particles.