Electron paramagnetic resonance and thermal behaviour of lithium potassium borate g1asses containing Cu~2+ ions

R.M. Krishna; J.J. Andre; V.P. Seth

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Electron paramagnetic resonance and thermal behaviour of lithium potassium borate g1asses containing Cu~2+ ions

机译：含Cu〜2 +离子的硼酸锂钾硼砂的电子顺磁共振和热行为

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The structure and thermal behaviour of lithium potassium borate glasses, containing 2 mol/100 Cu~2+ ions, have been studied by means of electron paramagnetic resonance (EPR) and differential scanning calorimetry (DSC). From the observed EPR spectra, the spin-Hamiltonian parameters have been evaluated which are independent of the temperature from room temperature to liquid helium temperature and it is observed that the spin-Hamiltonian parameters (SHP) are dependent on the concentration of alkali ions present in the glass system. The observed SHP shows that Cu~2- ions in lithium potassium borate glasses are present in a distorted octahedral environment. Characteristic glass transition temperatures, T_g, have also been measured for these borate glasses and it is found that the T_g decreases with increasing lithium content upto 10 mol/100 and then increases for further lithium content. The theoretical opti..l basicity, Λth of the glasses has also been evaluated and it is observed that the changes in optical basicity values are independent of the changes in SHP.

机译：借助电子顺磁共振（EPR）和差示扫描量热法（DSC）研究了含2 mol / 100 Cu〜2 +离子的硼酸锂锂硼玻璃的结构和热行为。从观测到的EPR光谱中，已评估了自旋哈密顿参数，该参数与从室温到液氦温度的温度无关，并且观察到自旋哈密顿参数（SHP）取决于存在于其中的碱离子浓度。玻璃系统。观察到的SHP表明，硼酸锂钾玻璃中的Cu〜2-离子存在于扭曲的八面体环境中。还已经针对这些硼酸盐玻璃测量了特征玻璃化转变温度T_g，并且发现T_g随着锂含量的增加直至10mol / 100而降低，然后针对进一步的锂含量而升高。还已经评估了眼镜的理论上最适的碱度Λth，并且观察到光学碱度值的变化与SHP的变化无关。

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《Optical Materials》 |1999年第1期|p.47-52|共6页
作者
R.M. Krishna; J.J. Andre; V.P. Seth;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
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Electron paramagnetic resonance and thermal behaviour of lithium potassium borate g1asses containing Cu~2+ ions

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