Study on Optical Properties and Structure of Sm₂O₃ Doped Boron-Aluminosilicate Glass

Sm³⁺ doped B₂O₃-Al₂O₃-SiO₂ glasses were prepared by high temperature solid-state method. The absorption spectrum, excitation spectrum, emission spectrum and the effect on concentrations of Sm³⁺ were investigated at room temperature. The results indicated that, under the excitation of 472 nm, the glass gane visible (VIS) and near infra-red (NIR) emissions at 596, 641, 561, 1075, 1118 and 1177 nm, respectively. The optimum concentration of Sm³⁺ was determined to be 1.0 mol%. On the other hand, magic angle spin nuclear magnetic resonance (MAS NMR) and infrared (IR) spectra were utilized to characterize the the network structures of Sm₂O₃ doped boron aluminosilicate glasses. The results showed that network units, namely, [SiO₄], [BO₃], [BO₄], [AlO₄] existed in Sm³⁺ doped B₂O₃-Al₂O₃-SiO₂ glasses, and Sm³⁺ existed as network modifier. The higher Sm³⁺ concentration was, the more units of [BO₃] would transit to [BO₄].