Ceramics composite
View Patent ↗The present invention relates to a ceramics composite including an inorganic material which includes: a matrix phase including a translucent ceramics; and a phosphor phase including YAG containing Ce, in which a content of the phosphor phase is from 22% by volume to 55% by volume based on the whole phase including the matrix phase and the phosphor phase, a content of Ce in the YAG is 0.005 to 0.05 in terms of an atomic ratio of Ce to Y (Ce/Y), and the ceramics composite has a thickness in a light outgoing direction of 30 μm to 200 μm.
1. A ceramics composite comprising an inorganic material which comprises:
a matrix phase comprising translucent ceramics; and
a phosphor phase comprising YAG containing Ce,
wherein a content of the phosphor phase is from 22% by volume to 55% by volume based on a whole phase including the matrix phase and the phosphor phase,
wherein a content of Ce in the YAG is 0.005 to 0.05 in terms of an atomic ratio of Ce to Y (Ce/Y), and
wherein the ceramics composite has a thickness in a light outgoing direction of 30 μm to 200 μm.
2. The ceramics composite according to claim 1 , wherein the content of Ce in the YAG is 0.005 to 0.035 in said terms of the atomic ratio of Ce to Y (Ce/Y).
3. The ceramics composite according to claim 1 , wherein the ceramics composite has an emission peak wavelength of 551 nm to 580 nm at a time when a blue light enters into the ceramics composite.
4. The ceramics composite according to claim 2 , wherein the ceramics composite has an emission peak wavelength of 551 nm to 580 nm at a time when a blue light enters into the ceramics composite.
5. The ceramics composite according to claim 1 , wherein the matrix phase comprises Al 2 O 3 .
6. The ceramics composite according to claim 1 , wherein an average crystal particle size of particles of YAG containing Ce constituting the phosphor phase is 0.5 μm to 10.0 μm, and
wherein a surface roughness (Ra) on a light outgoing surface of the ceramics composite is 0.1 μm to 1.0 μm.
7. The ceramics composite according to claim 2 , wherein an average crystal particle size of particles of YAG containing Ce constituting the phosphor phase is 0.5 μm to 10.0 μm, and
wherein a surface roughness (Ra) on a light outgoing surface of the ceramics composite is 0.1 μm to 1.0 μm.
8. The ceramics composite according to claim 3 , wherein an average crystal particle size of particles of YAG containing Ce constituting the phosphor phase is 0.5 μm to 10.0 μm, and
wherein a surface roughness (Ra) on a light outgoing surface of the ceramics composite is 0.1 μm to 1.0 μm.
9. The ceramics composite according to claim 4 , wherein an average crystal particle size of particles of YAG containing Ce constituting the phosphor phase is 0.5 μm to 10.0 μm, and
wherein a surface roughness (Ra) on a light outgoing surface of the ceramics composite is 0.1 μm to 1.0 μm.
10. The ceramics composite according to claim 5 , wherein an average crystal particle size of particles of YAG containing Ce constituting the phosphor phase is 0.5 μm to 10.0 μm, and
wherein a surface roughness (Ra) on a light outgoing surface of the ceramics composite is 0.1 μm to 1.0 μm.