Phosphor plate, light emitting device, and method for manufacturing phosphor plate
AssigneeDenka Company Limited
InventorsTaiyo Yamaura, Yuki Kubota, Kazuhiro Ito, Hideyuki Emoto
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Abstract
A phosphor plate including: a complex containing an α-sialon phosphor and a sintered body containing spinel represented by a general formula M2xAl4-4xO6-4x (where M represents at least one of Mg, Mn, and Zn, and 0.2<x<0.6). In addition, there is provided a light emitting device including: a group III nitride semiconductor light emitting element; and the phosphor plate provided on one surface of the group III nitride semiconductor light emitting element. Further, there is provided a method for manufacturing the phosphor plate.
Claims10
A phosphor plate comprising:
- a complex containing an α-sialon phosphor and a sintered body containing spinel represented by a general formula M2xAl4-4xO6-4x (where M represents at least one of Mg, Mn, and Zn, and 0.2<x<0.6),
- wherein a total value of a content of the α-sialon phosphor and the sintered body containing the spinel is equal to or more than 99% by volume and equal to or less than 100% by volume with respect to the entire complex.
A method for manufacturing a phosphor plate comprising a complex containing an α-sialon phosphor and a sintered body containing spinel represented by a general formula M2xAl4-4xO6-4x, where M represents at least one of Mg, Mn, and Zn, and 0.2<x<0.6, the method comprising:
- a firing step of heating a mixture containing an α-sialon phosphor and a spinel raw material powder, wherein
- the spinel raw material powder is (i) a powder containing spinel represented by the general formula, and/or (ii) a mixture of a metal oxide powder represented by a general formula MO, where M represents at least one of Mg, Mn, and Zn, and an Al2O3 powder, and
- a BET specific surface area of the spinel raw material powder is equal to or more than 0.1 m2/g and equal to or less than 10.0 m2/g.
Dependencies are inferred from the claim text.