Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1988-02-29
1990-08-28
Silverman, Stanley
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
427 69, 427 70, 427107, 427237, 427255, 427343, 427377, 4274192, B05D 506, B05D 512
Patent
active
049524224
ABSTRACT:
A fluorescent lamp containing a Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 coating on a layer of yttrium vanadate phosphor and a method of coating the layer of the yttrium vanadate phosphor with a continuous protective coating of Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 is described. The method comprises applying a coating of a metal, such as yttrium or aluminum, on the yttrium vanadate phosphor then lehring the metallic coating at about 500.degree. C. to about 625.degree. C. to form a continuous protective coating of Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 overlaying the layer of phosphor.
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Hunt, Jr. Roger B.
Pappalardo Romano G.
Peters Thomas E.
Ericson Ivan L.
GTE Laboratories Incorporated
Silverman Stanley
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