Extraction of Nd~(3+)-doped LiYF_4 phosphor from sol-gel-derived oxyfluoride glass ceramics by hydrofluoric acid treatment

摘要

Nd~(3+)-doped oxyfluoride glass ceramics were synthesized by the sol-gel method. LiYF_4 crystallites were deposited in an amorphous matrix consisting mainly of silica by heat treatment at middle temperature of 400-600 ℃ in air. A hydrofluoric acid (HF) treatment was carried out on the glass ceramics, resulting in the extraction of LiYF_4 crystallites from the amorphous matrix. The photoluminescent (PL) properties were investigated for the sample before and after HF treatment. The results indicated that the Nd~(3+) ions were predominantly incorporated in LiYF_4, and the extraction of LiYF_4 crystallites was successfully carried out without changing the PL properties of Nd~(3+) ions.