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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Spectroscopic and dielectric properties of crystallized glass system
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Spectroscopic and dielectric properties of crystallized glass system

机译：结晶玻璃系统的光谱和介电性能

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摘要

Glasses of the composition 40PbO-(20-x)Sb_2O_3-40As_2O_3 were crystallized with different concentrations of NiO (x) ranging from 0 to 1.5 mol percent. The samples were characterized by X-ray diffraction, scanning electron microscopy and differential thermal analysis techniques. The X-ray diffraction and the scanning electron microscopic studies have revealed the presence of NiSb_2O_6, NiAs_2O_4, Ni_2As_2O_7, Pb_5Sb_2O_8, PbSb_2O_6, Pb_5Sb_4 O_(11) crystalline phases in these samples. Spectroscopic (IR and optical absorption), magnetic and dielectric studies have been investigated. The IR spectral studies have pointed out the glass ceramic network is composed of conventional ASO_3 and SbO_3 structural units; these studies have further indicated that the concentration of symmetrical vibrations of above structural groups decrease with increase in the concentration of NiO beyond 0.8 mol percent. The analysis of the results of optical absorption, magnetic properties and dielectric properties has indicated that there is a gradual transformation of Ni~(2+) ions from octahedral to tetrahedral positions when the concentration of the crystallizing agent NiO is increased beyond 0.8 mol percent. From these results it is also assessed that the glass crystallized with about 0.8 mol percent of NiO is more suitable for getting maximum luminescence efficiency in the NIR region.
机译：组成为40PbO-（20-x）Sb_2O_3-40As_2O_3的玻璃用浓度范围为0至1.5 mol％的NiO（x）进行结晶。通过X射线衍射，扫描电子显微镜和差热分析技术对样品进行表征。 X射线衍射和扫描电子显微镜研究表明，这些样品中存在NiSb_2O_6，NiAs_2O_4，Ni_2As_2O_7，Pb_5Sb_2O_8，PbSb_2O_6，Pb_5Sb_4 O_（11）结晶相。已经研究了光谱学（IR和光吸收），磁性和介电研究。红外光谱研究指出，玻璃陶瓷网络是由常规的ASO_3和SbO_3结构单元组成的。这些研究进一步表明，以上结构组的对称振动的浓度随着NiO的浓度增加超过0.8mol％而降低。对光吸收，磁性能和介电性能的结果的分析表明，当结晶剂NiO的浓度增加到0.8 mol％以上时，Ni〜（2+）离子从八面体位置逐渐转变为四面体位置。从这些结果，还评估了用约0.8mol％的NiO结晶的玻璃更适合在NIR区域中获得最大的发光效率。

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