在空气下制备掺二价稀土的硼酸盐及二价稀土离子(RE2+=Sm,Eu,Tm,Yb)的光谱特征

本文讨论了Sm2 、Eu2 、Tm2 、Yb2 等二价稀土离子的光谱特征 ,特别是在一些含四面体硼酸根的硼酸盐如SrB4 O7、SrB6 O10 和BaB8O13中它们的光谱性质。当以三价稀土离子取代化合物中的二价碱土离子时 ,利用不等价取代而产生的缺陷所带的电荷 ,可在高温的空气下使上述的稀土离子还原成二价 ,不需加入化学还原剂 ,从而提出了一个简便、安全的制备含二价稀土离子发光材料的方法

Preparation of Borates Doped with Divalent Rare Earth Ions(RE2+) in Air and Spectroscopy of Divalent Rare Earth Ions(RE2+=Sm, Eu, Tm, Yb)

The spectroscopic feature of divalent Sm 2 , Eu 2 , Tm 2 and Yb 2 is discussed in this paper. Especially the spectroscopic properties of some borates containing tetrahedral BO 4 group such as SrB 4O 7, SrB 6O 10 and BaB 8O 13 doped with these divalent ions are reported. When the divalent alkaline earth ion in these borates is replaced partially by the above trivalent rare earth ion, the charge carried in the produced defects can be used as reductant to reduce the doped rare earth ion into divalent state at high temperature even in air. Therefore, aconvenient and safe method is provided to prepared phosphors doped with these divalent rare earths.