Sol gel formation of polysilicate, titania, and alumina interlayers for enhanced adhesion of metal films on substrates

摘要

A metal-coated substrate, e.g., of glass, ceramic, or a hydroxy- functionalized material, wherein the improvement comprises a polysilicate, titania, or alumina interlayer between the substrate and the metal coating. The interlayer may have a porous microstructure, e.g., a polysilicate interlayer with an average pore size on the order of 50- 150 Angstroms.PPSuch articles, e.g., in the form of metal- coated fibers, may suitably be employed as reinforcing media in material composites having utility in structural applications, such as EMI shielding elements.PPAlso disclosed is a corresponding method for forming a metal coating on a substrate by the provision of an interlayer of the above type. The interlayer may suitably be formed by applying to the substrate a sol gel dispersion of the polysilicate, titania, or alumina material, followed by drying of the applied dispersion.