Glass composition dependence of luminescence due to Ge2+ center in germanate glasses
Glass composition dependence of luminescence due to Ge2+ center in germanate glasses
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DOI：
10.1016/j.jnoncrysol.2006.02.073
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发表时间：
2006-07
影响因子：
3.5
通讯作者：
N. Wada;Ichinotani Mayu;K. Kojima
中科院分区：
文献类型：
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作者：
N. Wada;Ichinotani Mayu;K. Kojima
使用装配在荧光光谱仪样品室中的组装热热电偶，通过熔融淬火方法制备了锗酸盐玻璃，随后测量了它们的发光和激发光谱。在GeO2玻璃中，由于Ge2+中心而产生的发光带出现在中心波长300和395nm处，它们的激发带分别在250和330nm处。在(100-x)GeO2-xMmOn玻璃中，对于MmOn=B2O3(x≤50)、SiO2(x≤40)和Al2O3(x≤2)，发光强度和因此Ge2+中心的量随着MmOn含量的增加而增加，其中M(2n/m)+离子(B3+、Si4+和Al3+)具有比Ge4+离子更低的碱度。相反，对于MmOn＝Li2O(x≤30)、Na2O(x≤20)、K2O(x≤20)、CaO(x≤20)、SrO(x≤3)、BaO(x≤15)、ZnO(x≤20)、Ga2O3(x≤10)、Sb2O3(x≤20)、Bi2O3(15≤x≤25)， TiO2(x≤3)和Nb2O5(x≤10)的发光强度和Ge2+中心的数量随着添加量的增加而迅速降低并消失，其中M(2n/m)+离子(Li+、Na+、K+、Ca2+、Sr2+、Ba2+、Zn2+、Ga3+、Sb3+、Bi3+、Ti4+和Nb5+)的碱度比Ge4+离子。
Germanate glasses were prepared by the melt-quenching method using an assembled hot-thermocoupler equipped in a sample chamber of a fluorescence spectrometer, and subsequently their luminescence and excitation spectra were measured. In the GeO2glass, luminescence bands due to the Ge2+center appeared at the central wavelengths of 300 and 395nm, their excitation bands being at 250 and 330nm, respectively. In the (100−x)GeO2−xMmOnglasses, for MmOn=B2O3(x≦50), SiO2(x≦40), and Al2O3(x≦2), the luminescence intensity and therefore the amount of the Ge2+center increased with increasing the content of MmOn, where M(2n/m)+ions (B3+, Si4+, and Al3+) have lower basicities than a Ge4+ion. Contrarily, for MmOn=Li2O (x≦30), Na2O (x≦20), K2O (x≦20), CaO (x≦20), SrO (x≦3), BaO (x≦15), ZnO (x≦20), Ga2O3(x≦10), Sb2O3(x≦20), Bi2O3(15≦x≦25), TiO2(x≦3), and Nb2O5(x≦10), the luminescence intensity and the amount of the Ge2+center rapidly decreased with increasing the amount of additives and disappeared, where M(2n/m)+ions (Li+, Na+, K+, Ca2+, Sr2+, Ba2+, Zn2+, Ga3+, Sb3+, Bi3+, Ti4+, and Nb5+) have higher basicities than a Ge4+ion.