Optical coatings: add-ons or star performers?
Ian M. Thomas
The "sol-gel" process is one in which the final product is obtained from reactive precursor materials by chemical or thermal means. The term sol-gel is derived from the fact that the precursor materials are initially prepared in solution or colloidal suspension (SOL) and this solution goes through a gelling stage (GEL) prior to conversion to the final product.
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