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1 Material Safety Data Sheet. 2 Structure and properties. 3 Thermodynamic properties. ... This page provides supplementary chemical data on silicon tetrachloride.
Silicon tetrachloride or tetrachlorosilane is the inorganic compound with the formula SiCl 4. It is a colorless volatile liquid that fumes in air. It is used to produce high purity silicon and silica for commercial applications.
The rate of consumption of silicon tetrachloride is increasing due to rising demand for polysilicon around the world. Market Overview. Silicon Tetrachloride (SiCl₄) is a versatile chemical compound primarily used in the production of high-purity silica and optical fibers. Its applications span various high-tech industries, including ...
[15] [16] Above 420 °C (788 °F), silane decomposes into silicon and hydrogen; it can therefore be used in the chemical vapor deposition of silicon. The Si–H bond strength is around 384 kJ/mol, which is about 20% weaker than the H–H bond in H 2. Consequently, compounds containing Si–H bonds are much more reactive than is H 2.
Yields of 80-90% can be achieved. The main byproducts are silicon tetrachloride (chemical formula SiCl 4), hexachlorodisilane (Si 2 Cl 6) and dichlorosilane (H 2 SiCl 2), from which trichlorosilane can be separated by distillation. Tank car of trichlorosilane. UN number: 2988 (Chlorosilanes).
Hexachlorodisilane is stable under air or nitrogen at temperatures of at least up to 400°C for several hours, but decomposes to dodecachloroneopentasilane and silicon tetrachloride in presence of Lewis bases even at room temperature. [4] 4 Si 2 Cl 6 → 3 SiCl 4 + Si 5 Cl 12
Hexachlorodisiloxane is a chemical compound composed of chlorine, silicon, and oxygen. Structurally, it is the symmetrical ether of two trichlorosilyl groups, and can be synthesized via high-temperature oxidation of silicon tetrachloride : 2 SiCl 4 + O 2 → 950 − 970 ∘ C 2 ( SiCl 3 ) 2 O + Cl 2 {\displaystyle {\ce {2SiCl4{}+O2->[ \atop ...
Silicon tetrachloride is manufactured on a huge scale as a precursor to the production of pure silicon, silicon dioxide, and some silicon esters. [11] The silicon tetrahalides hydrolyse readily in water, unlike the carbon tetrahalides, again because of the larger size of the silicon atom rendering it more open to nucleophilic attack and the ...