To investigate the modification effect of the B2O3 component on tellurite glass, a series of glasses with a composition of xB2O3-(80-x)TeO2-10ZnO-10Na2O (x=0, 10, 20, 30, 40, 50, 60, 70, 80) and an additional amount of 0.5% Er2O3 (in molar) were prepared. The refractive index, the absorption edge of the host, the J-O parameters of Er3+, the fluorescent decay time, the bandwidth, and the quantum efficiency for the 4I13/2→4I15/2 transition were obtained theoretically and experimentally. These results indicated that the introduction of B2O3 modified the performance of the tellurite glass. For example, with increasing content of B2O3, the refractive index of the host decreases from 1.9 to 1.5, the absorption edge of the host shifted toward the blue regime, the intensity parameter Ω6 changed from 1.08×10-20 (for the pure tellurite glass) to 1.98×10-20 cm2 (for the pure borate glass), the bandwidth of the 4I13/2→4I15/2 transition increased, and the quantum efficiency of the 4I13/2→4I15/2 transition decreased.
(Y, Gd)BxV1- xO4-x :Eu3 + phosphors were prepared by solid state reaction. The red emission color purity of (Y, Gd)Bx V1 - x O4-x :Eu3 + phosphor is much better than that of the recent widely-used commercial red emitting phosphor (Y,Gd)BO3:Eu3+ and its relative emission intensity is 84% of the commercial phosphor (Y, Gd)BO3 :Eu3+. It is expected that (Y, Gd) Bx V1 -x O4: Eu3 + phosphor will be a promising candidate for PDP (plasma display panels) application.
Lai Huasheng Chen Baojiu Wang Linsheng Xu Wu Wang Xiaojun Xie Yihua Ren Xinguang Di Weihua
