Ibrahim S, Ali A A, Fathi Ahlam M
Glass Research Department, National Research Centre, El-Buhouth St., Dokki, Giza, 12622, Egypt.
Physical Chemistry Department, National Research Centre, El-Buhouth St., Dokki, Giza, 12622, Egypt.
Sci Rep. 2024 Apr 12;14(1):8518. doi: 10.1038/s41598-024-58567-w.
The multi-component glass system has a composition of 10KO-10ZnO-55 BO-(25-x)VO-xBiO (x = 4, 5, 7.5, 9, 10 mol%) are synthesized by the melt-quenching method. Using X-ray diffraction examination, the amorphous phase in the material was confirmed. The physical characteristics of the produced compositions are examined using density (D) and molar volume (V). Calculations of physical properties showed that adding BiO from 4 to 10 mol% increased the glass density from 2.7878 to 3.3617 g cm and decreased the molar volume from 40.4196 to 38.5895 cm/mol. Studies of glass samples using the FTIR show bands of absorption for oxides in different structural groups. Octahedral [ ], [ ], and tetrahedral [ ] structural units are observed in the present glass matrices. The cutoff wavelength ( ), and optical band gap energy were determined using UV absorption spectra. The increase in non-bridging oxygens can be linked to the decrease in optical band gap energy ( ) (direct and indirect) and the increase in cutoff wavelength with an increase in BiO content. This is attributed to the existence of bismuth ions and the creation of non-bridging oxygens. Besides that, the values of optical parameters, viz., optical electronegativity, refractive index, and molar refractivity, are calculated. The metallization criterion values are less than 1 and the glass samples exhibit an increased tendency towards metallization. Both the conductivity and the dielectric constant increase with the rise in BiO content, however, the dielectric loss and the impedance reduce. The behavior and values of conductivity for the studied glasses reveal the semiconducting properties of all glass samples. These results suggest that the produced glass samples may be employed as amorphous semiconductors in electronics and memory switching devices.
采用熔融淬火法合成了组成为10KO-10ZnO-55BO-(25-x)VO-xBiO（x = 4、5、7.5、9、10摩尔%）的多组分玻璃体系。通过X射线衍射检测，证实了材料中的非晶相。使用密度（D）和摩尔体积（V）对所制备组合物的物理特性进行了检测。物理性能计算表明，BiO添加量从4摩尔%增加到10摩尔%时，玻璃密度从2.7878克/立方厘米增加到3.3617克/立方厘米，摩尔体积从40.4196立方厘米/摩尔降低到38.5895立方厘米/摩尔。使用傅里叶变换红外光谱仪（FTIR）对玻璃样品进行研究，显示出不同结构基团中氧化物的吸收带。在当前的玻璃基体中观察到八面体[ ]、[ ]和四面体[ ]结构单元。使用紫外吸收光谱确定了截止波长（ ）和光学带隙能量。非桥氧的增加可与光学带隙能量（ ）（直接和间接）的降低以及随着BiO含量增加截止波长的增加相关联。这归因于铋离子的存在和非桥氧的产生。此外，还计算了光学参数值，即光学电负性、折射率和摩尔折射度。金属化判据值小于1，玻璃样品呈现出增加的金属化趋势。电导率和介电常数均随BiO含量的增加而增加，然而，介电损耗和阻抗降低。所研究玻璃的电导率行为和值揭示了所有玻璃样品的半导体性质。这些结果表明，所制备的玻璃样品可作为非晶半导体用于电子和记忆开关器件。
