Preparation of spherical phosphors by thermal-plasma treatment

摘要

Garnet-structured rare-earth oxysulfide and zinc sulfide phosphors were treated by ther- mal plasma in order to obtain spherically shaped phosphor particles. Although spherical particles of garnet phosphor and rare-earth oxysulfide phosphor were obtained, their luminescene properties were lowered. However, the properties could be partially restored by optimized heat treatment.