LOW TEMPERATURE PROCESS FOR COATING LAMP ENVELOPES

摘要

A phosphor coating process which provides for lower temperature lehring (less than about 550.degree.C) using a polyethylene oxide binder in combination with a relatively large amount (greater than about 1% of the phosphor weight) of finely-divided alumina as an adhesion promoter, The method provides about 30% savings of fuel for the lehring. The method can also be used to provide other coatings (such as pigments) and can be used to apply particles of which would be subject to oxidation and air at lehring temperatures, as the polyethylene oxide can be lehred away in a non-oxidized atmosphere.