Fluorescent lamps and improved yytrium-containing phosphors usef

Details Fluorescent lamps and improved yytrium-containing phosphors usef Fluorescent lamps and improved yytrium-containing phosphors usef

1993-04-30

1995-02-21

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313487, 313489, 2523014P.301.4S, 2523014H, 428403, 428691, 428704, H01J 163, C09K 1161, C09K 1170

Patent

active

053919599

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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