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This is called an n-type semiconductor. Boron can also be used to dope a pure crystal of silicon. But since boron only offers 3 of. the four electrons that a silicon atom needs, each silicon center is left with a hole. Semiconductors made in this manner are called p-type. In a p-type material if an atom from a neighbouring atom fills the hole, it will leave a. hole adjacent to it.
Silicon is an important constituent of electrical steel, modifying its resistivity and ferromagnetic properties. The properties of silicon can be used to modify alloys with metals other than iron. Metallurgical grade silicon is silicon of 95â99% purity. About 55% of the world consumption of metallurgical purity silicon goes for production of aluminium-silicon alloys (silumin alloys) for aluminium part casts, mainly for use in the automotive industry.