Fluorescent lamps and improved yttrium-containing phosphors usef

Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium

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Details

313487, 313489, 2523014P, 2523014S, 2523014H, 428403, 428691, 428704, H01J 0163, C09K 1161, C09K 1170

Patent

active

052686140

ABSTRACT:
Yttrium-containing phosphors can be stabilized for use in an aqueous slurry containing a binder, which slurry can be used for coating fluorescent lamps by treating with ammonium dihydrogen phosphate and ammonium hydrogen difluoride to inactivate free yttrium ions. The resulting aqueous slurry is stable and provides coated fluorescent lamps having uniform coatings that are bright and long lasting.

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