Metallurgical Grade

Some articles on metallurgical grade, metallurgical, grades:

Silicon Compounds - Applications - Electronics
... elemental silicon produced is refined to metallurgical grade purity (a total of 1.3–1.5 million metric tons/year) ... purity is estimated at only 15% of the world production of metallurgical grade silicon ... include hydrogenated amorphous silicon and upgraded metallurgical-grade silicon (UMG-Si) which are used in the production of low-cost, large-area electronics in applications such as ...
Silicon Compounds - Production - Metallurgical Grade
... than 1 to 2% of total elemental silicon (5–10% of metallurgical grade silicon) ever purified to higher grades for use in electronics ... Metallurgical grade silicon is commercially prepared by the reaction of high-purity silica with wood, charcoal, and coal in an electric arc furnace using carbon electrodes ... The silicon produced this manner is called metallurgical grade silicon and is at least 98% pure ...

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