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US 11,897,814 B2Granted
Rare earth aluminate sintered compact and method for producing rare earth aluminate sintered compact
AssigneeNichia Corporation
InventorsShozo Taketomi, Ryo Yamamoto, Tomomi Fujii, Toshiyuki Hirai
Life of this patent
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Abstract
A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 μm to 1.3 μm, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 μm to 1.2 μm.
Claims14
A rare earth aluminate sintered compact comprising a plurality of rare earth aluminate phosphor crystalline phases and a plurality of voids, wherein
- an absolute maximum length of 90% or more by number of the rare earth aluminate phosphor crystalline phases is in a range from 0.4 μm to 1.3 μm, and
- an absolute maximum length of 90% or more by number of the voids is in a range from 0.1 μm to 1.2 μm,
- wherein a distance between two farthest points on a contour of one of the rare earth aluminate phosphor crystalline phases or the voids included in a measurement range on a surface or cross section of the rare earth aluminate sintered compact is defined as the absolute maximum length of the one of the rare earth aluminate phosphor crystalline phases or the voids.
Dependencies are inferred from the claim text.