Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1996-09-09
1999-06-01
Le, Hoa T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
2523016R, 25230145, 4272481, 4272553, 428404, 428405, 428690, 428917, B32B 516, C09K 1154, C23C 1606
Patent
active
059086980
ABSTRACT:
Encapsulated electroluminescent phosphor particles and method for making same. The phosphor particles are encapsulated in a very thin oxide layer to protect them from aging due to moisture intrusion. The particles are encapsulated via a vapor phase hydrolysis reaction of oxide precursor materials at a temperature of between about 25.degree. C. and about 170.degree. C., preferably between about 100.degree. C. and about 150.degree. C. The resultant encapsulated particles exhibit a surprising combination of high initial luminescent brightness and high resistance to humidity-accelerated brightness decay.
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Knecht III Harold C.
Le Hoa T.
Minnesota Mining and Manufacturing Company
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