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Model Engineering Glossary: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Silicon

After carbon silicon is the most abundant element on earth. Silicon is obtained by reducing sand (silica: SiO2), with carbon.
Silicon exists in two forms;
  • brown silicon is a powder
  • crystalline (metallic) silicon is grey

The crystalline form is more widely used. Silicon has many applications in various industries:
  • semiconductor industry as a result of its semiconducting properties
  • as an alloying element in the manufacture of certain alloys (e.g. ferrosilicon, an alloy of iron and silicon which is used to introduce silicon into steel and cast iron)
  • in the manufacture of glass.

Silicon Bronze
95 % Copper 4 % Silicon 1 % Manganese

Silicon carbide
Used extensively as a grinding compound and in abrasive wheels.
Trade name: Carborundum
Chemical formula: SiC

See also: Chemical Table.

Model Engineering Glossary: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z