Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1997-06-30
1999-09-28
Le, Hoa T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
427215, 427218, 427219, 4272551, 4272553, 4272557, 428404, B32B 516, C23C 1606
Patent
active
059585919
ABSTRACT:
Encapsulated electroluminescent phosphor particles and a method of making same. Each phosphor particle is encapsulated by a substantially transparent aluminum oxide-based multiple oxide coating. The encapsulated phosphors exhibit high initial luminescent brightness and high resistance to humidity-accelerated decay of luminescent brightness. The aluminum oxide-based coating provides reduced sensitivity to chemical degradation caused by exposure to condensed moisture or otherwise liquid water. The coating comprises the aluminum oxide and at least one other metal oxide.
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Knecht III Harold C.
Le Hoa T.
Minnesota Mining and Manufacturing Company
Szymanski Brian E.
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