稀土掺杂长余辉发光玻璃的研究

分别采用空气气氛和还原气氛，制备了稀土Eu₂O₃，Dy₂O₃掺杂的铝硅酸盐玻璃，利用荧光光谱仪对样品进行了测试。结果表明：空气气氛条件下制备的铝硅酸盐玻璃样品均不具备长余辉发光性能, 其激发光谱和发光光谱均是Eu3+的5D_i(i=0, 1)→7F_j(j=0～4)跃迁的典型光谱。经还原气氛处理后，单掺和双掺的铝硅酸盐玻璃样品均具有长余辉发光现象，单掺Eu2+的发光峰位于462 nm，而双掺Eu2+和Dy3+的发光峰位于457 nm，且双掺Eu2+和Dy3+的样品陷阱能级较深，样品的发光持续时间长达12 h以上。

Study on Rare Earth Doped Long Luminescence Glass

A luminosilicate glass samples doped with Eu203 and Dy2O3 were prepared under the air and reducing atmosphere respectively. The excitation spectra, emission spectra and thermal luminescence spectra of the samples prepared under different atmosphere were measured. Luminescence mechanism of the afterglow glasses wa s analyzed. The results showed that the sample prepared under an ambient atmosphere has no afterglow. Its excitation and emission spectra showed the typical transitions of (5)Di( i = 0, 1) --> (7)Fj (j = 0-4) from Eu3+ but the sample reheated at a reducing atmosphere has afterglow. The sample doped with Eu2+ shows luminescence peaking at 462 nm. And the sample codoped with Eu2+ and Dy3+ shows luminescence peaking at 457 nm. The afterglowluminescence can last more than 12 h.