Abstract
AbstractCa‐α‐SiAlON:Eu2+ oxynitride phosphors are typical luminescent materials with high thermal tolerances. A series of zinc borophosphate glass samples (ZnO–B2O3–P2O5) were prepared to investigate their ability to disperse Ca‐α‐SiAlON:Eu2+ phosphor powders and to obtain phosphor‐in‐glass (PiG). PiG was prepared with SiAlON and zinc borophosphate glass through a melting process, and seven types of PiGs were successfully obtained without obvious degradation of SiAlON. In particular, PiGs prepared from 30ZnO–40B2O3–30P2O5 and 60ZnO–30B2O3–10P2O5 (mol%) glasses showed the highest quantum efficiency (QE). The glass structures of the mother glasses were investigated by nuclear magnetic resonance spectroscopy (NMR) and Raman spectroscopy; it was important to reduce the Q0 species of PO4 units and 4‐coordinate boron for a high QE. From the X‐ray diffraction (XRD) and scanning electron microscopy (SEM) images, it was established that ZnAl2O4 was formed around the SiAlON powders in PiG composed of the 60ZnO–30B2O3–10P2O5 (mol%) glass.
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