Patent ID: 8398893
Filing Date: 2013-03-19
Classification: C09K,H01J

Abstract:
1. A method of preparing a halophosphate phosphor represented by Formula 1, the method comprising: mixing a metallic precursor compound, which comprises strontium pyrophosphate, strontium chloride and strontium carbonate, optionally a metal precursor compound selected from the group consisting of a barium precursor compound, a calcium precursor compound and mixture thereof, and an activator precursor compound to form a mixture; sintering the mixture under an oxygen or air atmosphere to form a sintered mixture; optionally mixing the sintered mixture with an aluminum precursor compound, a yttrium precursor compound, a lanthanum precursor compound and mixture thereof; milling the sintered mixture to form a milled product; and sintering the milled product under a reducing atmosphere: wherein A is barium or calcium, M′ is an activator and comprises at least one cation selected from the group consisting of Eu M is aluminum, yttrium or lanthanum, 0≦x≦4.8, 0<y≦0.2, and 0≦z<0.1.