Phosphor powder, composite, and light-emitting device
AssigneeDenka Company Limited
InventorsMoeko TANAKA, Tomohiro NOMIYAMA
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Abstract
A phosphor powder consisting of a red phosphor represented by a general formula (Srx, Ca1-x-y, Euy)AlSi(N,O)3 having the same crystal phase as that of CaAlSiN3. In the general formula, relationships of x<1 and 1−x−y>0 are satisfied. In a case where a cumulative 10% value of the phosphor powder in a volume-based particle size distribution curve is defined as D10, a cumulative 50% value is defined as D50, and a cumulative 90% value is defined as D90, a value of D50 is more than 20 μm and 40 μm or less, and a value of (D90−D10)/D50 is 1.12 or less.
Claims5
A phosphor powder consisting of a red phosphor represented by a general formula (Srx, Ca1-x-y, Euy)AlSi(N,O)3 having the same crystal phase as that of CaAlSiN3,
- wherein relationships of x<1 and 1−x−y>0 are satisfied, and
- in a case where a cumulative 10% value of the phosphor powder in a volume-based particle size distribution curve is defined as D10, a cumulative 50% value is defined as D50, and a cumulative 90% value is defined as D90, a value of D50 is more than 20 μm and 40 μm or less, and a value of (D90−D10)/D50 is 1.12 or less.
Dependencies are inferred from the claim text.