Complex crystal phosphor, light emitting device, surface light source apparatus, display apparatus, and lighting device
First Claim
1. A complex crystal phosphor of an inorganic composition comprising an M element, an Al element, silicon, oxygen, and nitrogen,wherein the inorganic composition has particles of at least a first crystal phase and a second crystal phase, so that a single particle comprises both the first crystal phase and the second crystal phase, and the first crystal phase includes a M2SiO4-yNy crystal, wherein 0<
- x<
3 and y=2x/3, and the second crystal phase includes a β
-sialon crystal,wherein M is at least one element selected from the group consisting of magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba).
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Abstract
A complex crystal phosphor is an inorganic composition containing at least an M element, an Al element, silicon, oxygen, and nitrogen. The inorganic composition has particles having at least two types of crystal phase, and the at least two types of crystal phase include a first crystal phase which is the same as a M2SiO4 crystal and a second crystal phase as a β-sialon crystal. Here, M is at least one element selected from the group consisting of (Mg), calcium (Ca), strontium (Sr), and barium (Ba).
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Citations
13 Claims
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1. A complex crystal phosphor of an inorganic composition comprising an M element, an Al element, silicon, oxygen, and nitrogen,
wherein the inorganic composition has particles of at least a first crystal phase and a second crystal phase, so that a single particle comprises both the first crystal phase and the second crystal phase, and the first crystal phase includes a M2SiO4-yNy crystal, wherein 0< - x<
3 and y=2x/3, and the second crystal phase includes a β
-sialon crystal,wherein M is at least one element selected from the group consisting of magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- x<
Specification