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US 12,012,536 B2Granted
β-SiAlON phosphor and light-emitting apparatus
AssigneeDenka Company Limited
InventorsYusuke Takeda, Tomohiro Nomiyama, Manabu Kobayashi, Shintaro Watanabe
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Abstract
A β-sialon phosphor represented by general formula: Si6-zAlzOzN8-z (0<z<4.2) has as a host crystal, a crystal structure identical to that of a β-sialon crystal phase and having a bulk density of 0.80 g/cm3 or more and 1.60 g/cm3 or less. Also, a light-emitting element includes the β-sialon phosphor and a semiconductor light-emitting element capable of exciting the β-sialon phosphor.
Claims7
A β-sialon phosphor represented by general formula:
- Si6-zAlzOzN8-z
- wherein 0<z<4.2,
- the phosphor having, as a host crystal, a crystal structure identical to that of a β-sialon crystal phase, having a bulk density of 0.80 g/cm3 or more and 1.60 g/cm3 or less, and having a span value of 0.96 or less,
- wherein the span value of the phosphor is calculated by the formula:
- (D90−D10)/(D50)
- in which D50 is a mass median size, and D10 and D90 are mean 10% and 90% sizes, respectively, obtained from a cumulative distribution curve measured by a laser diffraction scattering method according to JIS R1622:1995 and JIS R1629:1997.
3 more elements
Dependencies are inferred from the claim text.