Effects of Al_2O_3 on the structure and properties of aluminoborosilicate glasses

摘要

In alkaline earth aluminoborosilicate glasses CaO-B_2O_3-Al_2O_3-SiO_2, the changes of structure and properties caused by variations in the ratio Al_2O_3/B_2O_3 were investigated. The structure was investigated by Fourier transform infrared spectroscopy. The dielectric constant and tangent loss were measured at 1 MHz. Chemical durability was evaluated by weight losses of glass samples after immersion in HCl and NaOH solutions. The results indicated that the fraction of four-coordinated boron atoms (N_4), chemical durability and dielectric properties increased with increasing Al_2O_3/B_2O_3 replacements.