Characterization of Fe3 + doped mixed alkali zinc borate glasses — Physical and spectroscopic investigations
Characterization of Fe3 + doped mixed alkali zinc borate glasses — Physical and spectroscopic investigations
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DOI：
10.1016/j.jnoncrysol.2013.01.023
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发表时间：
2013-04
影响因子：
3.5
通讯作者：
G. R. Sundari;D. Sathish;T. Rao;C. Krishna;C. Reddy;R. Ravikumar
中科院分区：
文献类型：
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作者：
G. R. Sundari;D. Sathish;T. Rao;C. Krishna;C. Reddy;R. Ravikumar
采用熔体淬冷法制备了掺杂0.1mol%Fe_2 O_3的19.9ZnO+ xLi_2 O+（30-x）Na_2 O +50 B_2 O_3（5≤x≤25）（ZLNB）玻璃。所有的玻璃的物理参数进行评估，他们揭示了一个非线性的行为相对于组合物。粉末XRD图没有显示任何结晶峰，这表明其无定形性质。光学带隙和Urbach能量表现出混合碱效应。所有制备的玻璃样品被发现是强大的和稳定的结构与较低的值之间的Urbach能量位于0.010和0.022 eV。电子顺磁共振显示三个共振信号的g值在2.06，4.24和8.34在所有Fe 3+掺杂的玻璃。样品的光学吸收光谱显示出三个带，这是Fe 3+在畸变八面体对称性的特征。计算了晶体场参数（Dq）和Racah电子间排斥参数（B，C）。FT-IR光谱显示出BO 3和BO 4单元的特征振动。
The glasses of 19.9ZnO+xLi2O+(30−x)Na2O+50B2O3(5≤x≤25) (ZLNB) doped with 0.1mol% of paramagnetic Fe2O3impurity are prepared by melt quench technique. Physical parameters of all the glasses are evaluated and they reveal a non-linear behavior with respect to the composition. Powder XRD pattern has not revealed any crystalline peak which indicates its amorphous nature. The optical band gap and Urbach energies exhibited the mixed alkali effect. All the prepared glass samples are found to be strong and stable in structure with low values of Urbach energy which lie between 0.010 and 0.022eV. Electron paramagnetic resonance exhibited three resonance signals around g values at 2.06, 4.24 and 8.34 in the all Fe3+doped glasses. The optical absorption spectrum of the samples exhibited three bands which are characteristic of Fe3+in distorted octahedral symmetry. The crystal field parameter (Dq) and Racah inter electronic repulsion parameters (B, C) are evaluated. The FT-IR spectra of Fe3+doped glasses exhibited characteristic vibrations of BO3and BO4units.