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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 >Influence of Dy3+ ions on the physical, thermal, structural and optical properties of lithium zinc phosphate glasses
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Influence of Dy3+ ions on the physical, thermal, structural and optical properties of lithium zinc phosphate glasses

机译：DY3 +离子对磷酸锂锌锌的物理，热，结构和光学性质的影响

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摘要

Lithium zinc phosphate glasses activated with dysprosium ions were prepared by following the melt quenching method. The X-ray diffraction patterns confirmed the non-crystalline structure of the prepared glasses. All the physical parameters are calculated using appropriate formulae. Glass transition (T-g), melting (T-m) and crystallization (T-c) temperature were determined by analyzing the differential thermal curves and these values were used to determine certain thermal parameters. The thermal stability parameter was found to be greater than 100 degrees C for all the glasses indicating good thermal stability of the glass samples. In order to examine the functional groups and study the structural properties of the prepared glasses, Fourier transform infrared spectrum was recorded for all the glasses. Refractive index is found to be increasing with increase in Dy2O3 concentration. Optical direct and indirect band gaps were determined from Tauc's plots. The emission spectra showed two intense bands at 483 nm (blue) and 574 nm (yellow) along with two feeble bands at 663 nm and 752 nm which are the essential requirements for white LED applications. The maximum luminescence intensity was found in the glass sample with 1mol% Dy2O3. Yellow/Blue intensity ratio, chromaticity coordinates and the correlated color temperature are calculated for all the glass samples. The color coordinates obtained are found to be in the white light region of the CIE 1931 diagram indicating the possibility of using these glasses for white light generation.
机译：采用熔融淬火法制备了镝离子活化的磷酸锌锂玻璃。X射线衍射图证实了所制备玻璃的非晶态结构。所有物理参数均采用适当的公式计算。通过分析差热曲线确定了玻璃化转变（T-g）、熔化（T-m）和结晶（T-c）温度，并将这些值用于确定某些热参数。发现所有玻璃的热稳定性参数均大于100℃，表明玻璃样品具有良好的热稳定性。为了研究所制备玻璃的官能团和结构性质，记录了所有玻璃的傅里叶变换红外光谱。发现折射率随Dy2O3浓度的增加而增加。光学直接和间接带隙由Tauc图确定。发射光谱显示在483 nm（蓝色）和574 nm（黄色）处有两条强带，在663 nm和752 nm处有两条弱带，这是白光LED应用的基本要求。在含有1mol%Dy2O3的玻璃样品中发现最大发光强度。计算所有玻璃样品的黄/蓝强度比、色度坐标和相关色温。获得的颜色坐标位于CIE 1931图表的白光区域，表明使用这些玻璃产生白光的可能性。

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