Process for ion exchange on glass or glass ceramic

Details Process for ion exchange on glass or glass ceramic Process for ion exchange on glass or glass ceramic

C - Chemistry, Metallurgy

03

C

49/77, 49/0.2

C03C 21/00 (2006.01)

Patent

CA 2002496

A process for ion exchange at the surface of glass or glass ceramic is described, in which the ion exchange is carried out by means of a solid layer mainly consisting of one or more salts which do not melt at the exchange temperature and contain mono- or divalent cations. The layer can be applied to the glass as a dispersion in water or as an organic dispersion medium. Preferably, its thickness is 0.02 to 2 mm and the salts have a particle size of less than 60 µm. Despite the solid reaction, the ion exchange proceeds at a surpris- ingly rapid rate and leads to products having highly reproducible properties. Corrosive attack of the glass surface does not take place.

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