Luminescent nanophase binder systems for UV and VUV applications
AssigneeOsram Sylvania Inc.
InventorsCathy Shaw Trumble, Mary Ann Johnson
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Abstract
A luminescent nanophase binder is provided for use in UV and VUV applications. The binder promotes adherence of phosphor coatings to lamp envelopes and emits visible light under UV and VUV excitation. In a preferred embodiment, the binder comprises SiO2 nanoparticles doped with terbium or terbium and yttrium. Preferably, the nanoparticles have a particle size of less than 50 nm.
Claims20
A luminescent nanophase binder comprising nanoparticles of a luminescent glass which emit visible light under UV and VUV excitation.
A phosphor coating for a lamp comprising:
- a phosphor and a binder, the binder comprising nanoparticles of a luminescent glass which emit visible light under UV and VUV excitation.
A method for coating a lamp comprising forming a colloidal dispersion of SiO2 nanoparticles doped with terbium or terbium and yttrium, combining the colloidal dispersion with a suspension of a phosphor, coating the suspension on the lamp, drying the coating, and firing the coating at a temperature sufficient to remove water and residual organic material.
Dependencies are inferred from the claim text.