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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Alkaline earth zinc borate glasses doped with Cu~(2+) ions studied by EPR, optical and IR techniques
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Alkaline earth zinc borate glasses doped with Cu~(2+) ions studied by EPR, optical and IR techniques

机译：EPR，光学和红外技术研究掺杂Cu〜（2+）离子的碱土金属硼酸锌玻璃

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摘要

Copper ions incorporated into alkaline earth zinc borate glasses 10RO + 30ZnO + 60B_2O_3 (R = Mg, Ca and Sr) and 10SrO + (30 - x)ZnO + 60B_2O_3 + xCuO (x = 0, 0.1, 0.3, 0.5, and 0.7 wt.%) were characterized by electron paramagnetic resonance (EPR), optical absorption and FTIR techniques. The EPR spectra of all the glass samples exhibit resonance signals characteristic of Cu~(2+) ions. The values of spin-Hamiltonian parameters indicate that the Cu~(2+) ions in alkaline earth zinc borate glasses were present in octahedral sites with tetragonal distortion. The spin concentration (N) participating in resonance was calculated as a function of temperature for strontium zinc borate (SrZB) glass sample containing 0.7 wt.% of Cu~(2+) ions and the activation energy was calculated. From the EPR data, the paramagnetic susceptibility (χ) was calculated at different temperatures and the Curie constant was evaluated from the 1/χ-T graph. The optical absorption spectra of these samples show only one absorption band. The optical band gap energies (E_g) and Urbach energy (ΔE) are calculated from their ultraviolet edges. The FTIR studies show different stretching and bending vibrations of alkaline earth zinc borate glasses.
机译：掺入碱土金属硼酸锌玻璃10RO + 30ZnO + 60B_2O_3（R = Mg，Ca和Sr）和10SrO +（30-x）ZnO + 60B_2O_3 + xCuO（x = 0、0.1、0.3、0.5和0.7 wt ％）通过电子顺磁共振（EPR），光吸收和FTIR技术表征。所有玻璃样品的EPR谱均表现出Cu〜（2+）离子的共振信号特征。自旋哈密顿参数的值表明碱土金属硼酸锌玻璃中的Cu〜（2+）离子以八边形畸变存在于八面体位置。对于包含0.7 wt。％Cu〜（2+）离子的硼酸锶锌（SrZB）玻璃样品，计算参与共振的自旋浓度（N）与温度的关系，并计算活化能。根据EPR数据，计算出不同温度下的顺磁化率（χ），并根据1 /χ-T图评估居里常数。这些样品的光吸收光谱仅显示一个吸收带。从它们的紫外线边缘计算出光学带隙能（E_g）和乌尔巴赫能（ΔE）。 FTIR研究表明，碱土金属硼酸锌玻璃的拉伸和弯曲振动不同。

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