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AssigneeCurrent Lighting Solutions, LLC
InventorsDigamber Gurudas Porob, Prasanth Kumar Nammalwar, Srinidhi Ramachandra, Matthew David Butts, James Edward Murphy
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A process for coating a phosphor of formula I: Ax[MFy]:Mn4+ includes combining the phosphor of formula I in particulate form with a first solution including a compound of formula II: Ax[MFy] to form a suspension and combining a second solution with the suspension, the second solution including a precursor including an element selected from the group consisting of calcium, strontium, magnesium, yittrium, barium, scandium, lanthanum, and combinations thereof. A population of particles having a core including a phosphor of formula I and a manganese-free composite coating disposed on the core, and a lighting apparatus (10) including the population of particles are also presented.
A process comprising:
A process comprising combining K2SiF6:Mn4+ in particulate form in a first solution comprising K2SiF6 and aqueous hydrofluoric acid, to form a suspension;
A population of particles having a core comprising a phosphor of formula I and a manganese-free composite coating disposed on the core, the manganese-free composite coating comprising a compound of formula II and a metal fluoride selected from the group consisting of calcium fluoride, strontium fluoride, magnesium fluoride, yttrium fluoride, scandium fluoride, lanthanum fluoride, and combinations thereof,
Dependencies are inferred from the claim text.