PROCESS OF FORMING PHOSPHOR PARTICLES WITH CORE SHELL STRUCTURES

摘要

Processes for producing particles of rare earth-containing phosphor materials, in which the particles have a core-shell structure and the shell has a lower rare earth content than the core. Such a process may include contacting a core particle with a precursor comprising Na(La,Ce,Tb)P2O7 to form a mixture, and then heating the mixture to a temperature sufficient to decompose the Na(La,Ce,Tb)P2O7 to evolve and melt an NaPO3 flux and initiate deposition of a (La,Ce,Tb)PO4 shell on each core particle in the presence of the molten NaPO3 flux.

主权项

1. A process of producing a phosphor particle that comprises a core surrounded by a shell that absorbs ultraviolet photons to emit green-spectrum light, the process comprising:
contacting a core particle with a precursor comprising Na(La,Ce,Tb)P2O7 to form a mixture; and heating the mixture to a temperature sufficient to decompose the Na(La,Ce,Tb)P2O7 to evolve and melt an NaPO3 flux and initiate deposition of a (La,Ce,Tb)PO4 shell on each core particle in the presence of the molten NaPO3 flux.