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US 2010/0061077 A1Published application
Phosphor body based on flake form substrates
AssigneeMerck Patent Gesellschaft
InventorsHolger Winkler, Klaus Ambrosius, Ralf Petry
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Abstract
The invention relates to a phosphor element which consists of natural and/or synthetic flake-form substrates, such as mica, corundum, silica, glass, ZrO2 or TiO2, and at least one phosphor, to the production thereof, and to the use thereof as LED conversion phosphor for white LEDs or so-called colour-on-demand applications.
Claims28
Phosphor element consisting of a phosphor-coated substrate comprising mica, glass, ZrO2, TiO2, SiO2 or Al2O3 flakes or mixtures thereof.
Process for the production of a phosphor element having the following process steps:
- a) preparation of a phosphor precursor suspension by mixing at least two starting materials and at least one dopant by wet-chemical methods,
- b) preparation of a substrate comprising an aqueous suspension of mica, glass, ZrO2, TiO2, SiO2 or Al2O3 flakes or mixtures thereof,
- c) combination of the suspensions prepared under steps a and b,
- d) subsequent thermal treatment of the phosphor-coated substrate to give the phosphor element.
1 more element
Dependencies are inferred from the claim text.