FLUORESCENT POWDER, COMPLEX AND LIGHT EMITTING DEVICE

• Main Authors: NOMIYAMA TOMOHIRO, TAKEDA YUSUKE, OKUZONO TATSUYA, MIYAZAKI MASARU, TAKAMURA MARINA, WATANABE SHINTARO
• Format: Patent
• Language: English; Japanese
• Published: 04.02.2021
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; SEMICONDUCTOR DEVICES

To provide a technology related to fluorescent powder having improved light emission characteristics.SOLUTION: One mode of the present invention is a fluorescent powder composed of α-type sialon fluorescent particles containing Eu. The fluorescent powder has a volume-based median diameter (D50) of 10 μm or more and 20 μm or less by the laser diffraction/scattering method, and a diffuse reflectance of 93% or more and 99% or less for light having a wavelength of 600 nm.SELECTED DRAWING: Figure 1 【課題】発光特性が向上した蛍光体粉末に関する技術を提供する。【解決手段】本発明のある態様は、Ｅｕを含有するα型サイアロン蛍光体粒子からなる蛍光体粉末である。当該蛍光体粉末は、レーザ回折散乱法による体積基準のメジアン径（Ｄ５０）が１０μｍ以上２０μｍ以下であり、波長６００ｎｍの光に対する拡散反射率が９３％以上９９％以下である。【選択図】図１