Study On Preparation, Characterization And Properties Of Nd³⁺, Yb³⁺: Y₂O₃ Polycrystalline Materials

Nd3+,Yb3+:Y2O3 polycrystalline materials were prepared by Citrate-gel-combustion method and anti-drop co-precipitation method. The influences of the pH value, temperature and drop rate on the precursor of Nd3+,Yb3+:Y2O3 polycrystalline materials were discussed, at the same time, with XRD, IR, SEM, DTA-TG and Fluorescence spectrum analysis were employed to characterize the samples. The results show that the outstanding precursor were prepared by Citrate-gel-combustion method when pH value was 3-4, amd temperature was 70-80℃. The outstanding precursor were obtained when pH value was 7-8, drop rate was 2ml/min and use (NH4)2SO4 as dispersant by anti-drop co-precipitation method.XRD and IR test showed that the temperature of synthesis of Nd3+.Yb3+:Y2O3 polycrystalline materials by Citrate-gel-combustion method was 900℃. SEM analysis indicated that the average diameter was about 40nm. TG-DTA analysis revealed that the mass loss value was about 49.28% between 30℃to 600℃. Fluorescence spectrum analysis indicated which had two main emission peaks between 970-1100nm, and the strongest fluorescence peak at 1030nm, that was 2F7/2â†'2F5/2 of Yb3+. Upconversion luminescence analysis showed that the green, yellow and red were observed under the excitation of 1029 nm. XRD and IR test showed that optimum calcination temperature of sample was 700℃by Anti-drop co-precipitation method, the average diameter was about 20-30nm, the mass loss value was about 39.17% between 30℃to 650℃. The strongest fluorescence peak was 1030 nm, that was 2F7/2â†'2F5/2 of Yb3+, and Nd3+â†'Yb3+ energy transfer was proved.