The Synthesis and Particle Growth Mechanism of Bright Green Phosphor YAG : Tb

Abstract

The conventional method of preparing requires repeated firing to form single‐phase cubic material. When a, , , or , or is used as a reaction reagent, however, only a single firing produces single‐phase cubic material. The solid‐liquid phase reaction occurs during firing between the raw oxide materials as well as other by‐products. X‐ray diffraction patterns identify these by‐products as , , , , and . The particle growth is facilitated by a process in which small particles first gather in the contact area between large particles where fluoride melts and forms a liquid film, then dissolve and finally precipitate when saturated to reduce the surface energy.