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Photocatalytically-activated self-cleaning article and method of making same

  • US 6,027,766 A
  • Filed: 07/23/1997
  • Issued: 02/22/2000
  • Est. Priority Date: 03/14/1997
  • Status: Expired due to Term
First Claim
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1. A method comprising the steps of:

  • manufacturing a continuous glass float ribbon having a first major surface and an opposite major surface defined as a second major surface, the first major surface having tin diffused therein characteristic of forming the glass float ribbon on a molten tin bath,positioning a chemical vapor deposition coating apparatus over the surface of the float ribbon at a paint in the manufacture of the float ribbon where the float ribbon has a temperature of at least about 400°

    C. (752°

    F.);

    directing a metal oxide precursor selected from the group consisting of titanium tetrachloride, titanium tetraisopropoxide and titanium tetraethoxide in a carrier gas stream through said chemical vapor deposition apparatus over a surface of the float ribbon and annealing the float ribbon to produce titanium dioxide in the crystalline phase as a photocatalytically-activated self-cleaning coating over the glass float ribbon, whereby said coating has a photocatalytically-activated self-cleaning reaction rate of least about 2×

    10-3 cm-1 min-1.

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