Khater G A, Gomaa Mohamed M, Kang Junfeng, Mahmoud M A
National Research Centre, Glass Department, Cairo, Egypt.
National Research Centre, Geophysical Sciences Department, Cairo, Egypt.
Heliyon. 2019 Feb 19;5(2):e01248. doi: 10.1016/j.heliyon.2019.e01248. eCollection 2019 Feb.
The effect of CaO∖SiO molar ratio on the electrical properties of some glass materials was examined, using the impedance spectroscopy, at different frequency ranges, from 100 Hz up to 5 MHz. Also, a trial was accomplished to study the influence of CaO∖SiO molar ratio on some physical properties such as density, micro-hardness and bending strength. Six glass batches, based on Sinai basaltic rocks and bypass cement dust, were prepared with different CaO/SiO molar ratios (0.2-0.93 mol %). Accordingly, the electrical properties (conductivity dielectric constant and dielectric loss) of these samples show noticeable change. Electrical results show that the samples with relatively low (CaO/SiO) molar ratio have relatively higher electrical conductivity, compared to the other samples with higher (CaO/SiO) molar ratios, at different frequencies. Also, at the same time, the bending strength and Vickers micro-hardness show a gradual increase from 56 to 118 MPa and from 4020 to 6120 MPa, respectively, with decreasing CaO/SiO molar ratio. The density of the samples shows a successive increase from 2.79 to 2.96 gm/cm with the successive additions of bypass cement dust.
利用阻抗谱在100 Hz至5 MHz的不同频率范围内，研究了CaO∖SiO摩尔比对某些玻璃材料电学性能的影响。此外，还尝试研究了CaO∖SiO摩尔比对密度、显微硬度和弯曲强度等一些物理性能的影响。基于西奈玄武岩和旁路水泥粉尘制备了六种玻璃批次，其CaO/SiO摩尔比不同（0.2 - 0.93 mol%）。相应地，这些样品的电学性能（电导率、介电常数和介电损耗）呈现出显著变化。电学结果表明，在不同频率下，与其他具有较高（CaO/SiO）摩尔比的样品相比，具有相对较低（CaO/SiO）摩尔比的样品具有相对较高的电导率。同时，随着CaO/SiO摩尔比的降低，弯曲强度和维氏显微硬度分别从56 MPa逐渐增加到118 MPa，从4020 MPa逐渐增加到6120 MPa。随着旁路水泥粉尘的连续添加，样品的密度从2.79 g/cm连续增加到2.96 g/cm。
