Process for producing a blue emitting lamp phosphor

Details Process for producing a blue emitting lamp phosphor Process for producing a blue emitting lamp phosphor

1993-11-24

1994-10-25

Bell, Janyce

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 67, 427215, 427346, B05D 506

Patent

active

053587340

ABSTRACT:
A fluorescent lamp comprising a sealed envelope, a pair of opposing electrodes, a fill of inert gas and mercury and a phosphor coating on the internal walls of the envelope wherein the coating contains as at least one element thereof particles of europium activated barium magnesium aluminate having an average particle size of about 4 micrometers, less than about 5% of the particles having a size greater than 15 microns and less than about 5% of the particles having a size less than about 1 micron, said particles having on the external surfaces thereof a coating of sub-micron aluminum oxide having a surface area of from about 80 to about 120 square meters per gram, said coating being sufficient to impart stir in quality to said phosphor.

REFERENCES:
patent: 2987414 (1961-06-01), Martyny
patent: 4161457 (1979-07-01), Takahashi

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