Ni 2+ /Er 3+ dual-doped transparent glass ceramic containing γ-Ga 2 O 3 and β-YF 3 nanocrystals is prepared by melt quenching and subsequent heating. It is experimentally demonstrated that Ni 2+ and Er 3+ are partitioned into γ-Ga 2 O 3 and β-YF 3 nanocrystals, respectively, which greatly reduces the adverse energy transfer between them. Accordingly, an integrated broad near-infrared emission band in the wavelength region of 1020–1650nm, consisting of Ni 2+ : 3 T 2 (F)→ 3 A 2 (F) emission around 1220nm and Er 3+ : 4 I 13/2 → 4 I 15/2 emission around 1540nm, is observed under 980nm excitation. Compared to that in the Ni 2+ /Er 3+ dual-doped glass ceramic containing γ-Ga 2 O 3 and LaF 3 nanocrystals, the integrated near-infrared emission intensity in the present sample is increased by two times, ascribing to the higher Er 3+ solubility in β-YF 3 crystallites.