Alkali borate glasses in the composition (Na₂O)_x − (V₂O₅)_0.20 − (K₂O)_0.30−x − (B₂O₃)_0.50 (0 ≤ x ≤ 0.30) have been investigated for density, structural and dc electrical conductivity properties. Melt-quenching technique has been employed to synthesize the present glass samples. Amorphous nature of the samples was confirmed by x-ray diffraction results. The variation in density and molar volume ranging up to x = 0.20 suggested the formation of non-bridging oxygen’s in the glass matrix. Further, Fourier Transform Infrared study confirmed the presence of [BO₃] and [BO₄] units placed at different structural groups. The composition dependent variation in peak positions of B–O–B bending and stretching of [BO₃] and [BO₄] units was observed to be non-linear. High-temperature dc electrical conductivity has been explained using Mott’s small polaron hopping theory. The electrical conductivity exhibited a dip and activation energy showed a peak at x = 0.20 mole, fraction of Na₂O content suggested the occurrence of a mixed alkali effect. The low-temperature dc conductivity data has been analyzed using variable-range hopping theoretical models.

已经研究了成分 (Na ₂ O) _x - (V ₂ O ₅ ) _0.20 - (K ₂ O) _{0.30- x} - (B ₂ O ₃ ) _0.50 (0 ≤ x ≤ 0.30)中的碱硼酸盐玻璃的密度，结构和直流电导率特性。熔融淬火技术已被用于合成本玻璃样品。X-射线衍射结果证实了样品的无定形性质。密度和摩尔体积的变化范围可达x= 0.20 表明在玻璃基质中形成了非桥连氧。此外，傅立叶变换红外研究证实了[BO ₃ ] 和[BO ₄ ] 单元位于不同结构基团的存在。观察到[BO ₃ ] 和[BO ₄ ] 单元的B-O-B 弯曲和拉伸峰位置的组成依赖变化是非线性的。已经使用莫特的小极化子跳跃理论解释了高温直流电导率。电导率出现下降，活化能在x = 0.20 摩尔，Na _{2 的}分数处出现峰值O含量表明混合碱效应的发生。使用可变范围跳跃理论模型分析了低温直流电导率数据。