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US 2022/0089947 A1Published application
Phosphor particle, composite, light-emitting device, and method for producing phosphor particle
AssigneeDenka Company Limited
InventorsTomohiro NOMIYAMA, Yusuke TAKEDA, Marina TAKAMURA, Tatsuya OKUZONO, Masaru MIYAZAKI, Shintaro WATANABE
Life of this patent
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Abstract
An α-sialon phosphor particle containing Eu. At least one slit is formed on a surface of the α-sialon phosphor particle. The α-sialon phosphor particle is preferably produced by undergoing a raw material mixing step, a heating step, a pulverizing step, and an acid treatment step.
Claims16
1-18. (canceled)
An α-sialon phosphor particle containing Eu,
- wherein at least one slit is formed on a surface of the α-sialon phosphor particle,
- wherein a distance from the surface of the α-sialon phosphor particle to a bottom of the slit is equal to or more than 200 nm and equal to or less than 1,500 nm in at least one cross-section of the slit, and
- wherein the α-sialon phosphor particle is formed of an α-sialon phosphor containing an Eu element, represented by General Formula:
- (M1x, M2y, Euz)(Si12−(m+n)Alm+n)(OnN16−n) (provided that M1 is a monovalent Li element and M2 is a divalent Ca element), and in the general formula, x=0, 0<y<2.0, 0<z<0.5, 0<x+y, 0.3<x+y+z<2.0, 0<m<4.0, and 0<n<3.0 are satisfied.
1 more element
An α-sialon phosphor particle containing Eu,
- wherein at least one slit is formed on a surface of the α-sialon phosphor particle,
- wherein a width in a direction orthogonal to an extending direction of the slit is equal to or more than 50 nm and equal to or less than 500 nm with respect to an opening by the slit formed on the surface of the α-sialon phosphor particle in at least one cross-section of the slit, and
- wherein the α-sialon phosphor particle is formed of an α-sialon phosphor containing an Eu element, represented by General Formula:
- (M1x, M2y, Euz)(Si12−(m+n)Alm+n)(OnN16−n) (provided that M1 is a monovalent Li element and M2 is a divalent Ca element), and in the general formula, x=0, 0<y<2.0, 0<z<0.5, 0<x+y, 0.3<x+y+z<2.0, 0<m<4.0, and 0<n<3.0 are satisfied.
1 more element
An α-sialon phosphor particle containing Eu,
- wherein at least one slit is formed on a surface of the α-sialon phosphor particle,
- wherein L>P is satisfied, where a maximum diameter of the α-sialon phosphor particle in a case of being viewed in a plan view is defined as P and a total path length along the slit is defined as L, and
- wherein the α-sialon phosphor particle is formed of an α-sialon phosphor containing an Eu element, represented by General Formula:
- (M1x, M2y, Euz)(Si12−(m+n)Alm+n)(OnN16−n) (provided that M1 is a monovalent Li element and M2 is a divalent Ca element), and in the general formula, x=0, 0<y<2.0, 0<z<0.5, 0<x+y, 0.3<x+y+z<2.0, 0<m<4.0, and 0<n<3.0 are satisfied.
1 more element
Dependencies are inferred from the claim text.