Dielectric properties of barium-vanadate glasses

The linear impedance of barium-vanadate glasses was measured. Samples of the composition of xBaO-(100-x)V2O5 where x= 30, 40 and 45 (in %mol) were prepared by the conventional melt quenching technique. Appropriate amounts of reagents: BaO (≥99.9%, P.P.H STANLAB Sp.J.) and V2O5 (≥99.9%, POCH) were thoroughly mixed in an agate mortar. The melting was performed in porcelain crucibles at 1273 K for 10–30 min, depending on glass composition. The melts were poured on preheated (to 393 K) brass plate and pressed by another plate to obtain flat circular pellets of 1-2 mm thickness and 10-20 mm in diameter.For the electrical measurements gold electrodes were evaporated at the polished samples. Impedance measurements were carried out in the frequency range from 10 mHz to 1 MHz with the ac voltage of 1 Vrms in the temperature range from 153 K to 423 K with the Novocontrol Concept 40 broadband dielectric spectrometer. Detailed information can be found in: doi: 10.1016/j.proeng.2014.12.489

本数据集针对钒酸钡玻璃的线性阻抗开展了测试表征。制备了组分为xBaO-(100-x)V2O5（x=30、40、45，摩尔百分比）的玻璃样品，合成方法采用传统熔融淬火法。称取适量试剂：BaO（纯度≥99.9%，购自P.P.H STANLAB Sp.J.）与V2O5（纯度≥99.9%，购自POCH），在玛瑙研钵中充分研磨混合。将混合原料置于瓷坩埚中，于1273 K温度下熔融，保温时长为10~30分钟，具体时长根据玻璃组分调整。将熔融液浇铸至预热至393 K的黄铜板上，随后用另一块平板施压，制得厚度1~2 mm、直径10~20 mm的扁平圆形玻璃压片。为开展电学测试，在抛光后的样品表面蒸镀金电极。阻抗测试采用Novocontrol Concept 40型宽频介电谱仪完成，测试频率范围为10 mHz至1 MHz，施加的交流电压为1 Vrms，测试温度区间为153 K至423 K。详细研究细节可参见：DOI: 10.1016/j.proeng.2014.12.489