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Silicon Metal and Alloys

Silicon is the particular and important semiconductor element, it carries the typical properties of both metals and non-metals. After carbon, silcon is the most abundant element on earth, the abundance being 277,000 ppm. It is generally present as a silicate, these being found in many rocks, clays and soils. Silicon is obtained by reducing silica (sand, SiO₂), with carbon.

ATT provides silicon powder (Silicon metal powder) that is used widely in semiconductor technology, computer microchips, transistors and solar cells. Silicon powder is also used to manufacture other silicon compounds. Our silicon powder is produced using minimally sized grains, mesh size ranging from 100mesh to 325 mesh. Other size range can be customized. We also provide silicon sputtering target.

Further purification of the element for applications requiring high purity material (e.g. semi conductor devices) is achieved by zone refining, the resulting purity being better than 1:10⁹. Silicon exists in two allotropic forms; brown silicon is a powder, whereas crystalline (metallic) silicon is grey and it is the latter which is more widely used. Bulk silicon is unreactive towards oxygen, water, acids (excluding HF), but is soluble in hot alkalis. Silicon has many applications in various industries; for example, ultra high purity silicon is used in the semiconductor industry as a result of its semiconducting properties. Silicon is also used 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). It is also used in the manufacture of glass.

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