Phosphor production method and phosphor

• Main Authors: KANNAMI, MASAKI, ARIMURA, TAKASHI, NAITO, SHOTA, IWASAKI, KENTARO, SASAKI, SHINICHI
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: ACCESSORIES THEREFOR; ADHESIVES; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BASIC ELECTRIC ELEMENTS; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; CINEMATOGRAPHY; DYES; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; GLASS; HOLOGRAPHY; JOINING GLASS TO GLASS OR OTHER MATERIALS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINERAL OR SLAG WOOL; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PHOTOGRAPHY; PHYSICS; POLISHES; SEMICONDUCTOR DEVICES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

Provided is a method for producing a phosphor having a core-shell structure that has: a core part that is composed of a crystal phase of an inorganic compound having a metal element M and aluminum constituting luminescent center ions; and a shell part that contains at least one element selected from the group consisting of boron and silicon, and that is formed on at least a portion of the surface of the core part. The method includes: a step for mixing a raw material of the crystal phase and a raw material of the shell part; and a step for heating the obtained mixture at a temperature at which the raw material of the shell part is liquefied but a host crystal of a phosphor to be obtained can be retained, wherein the raw material of the crystal phase contains a raw material compound in which D50 in the particle size distribution is 0.2-90 [mu]m and that contains aluminum.