硅硼比对镁铝硼硅酸盐玻璃结构、化学稳定性和介电性能的影响

采用熔融冷却的方法制备了镁铝硼硅玻璃。研究了SiO_2取代B_2O_3对玻璃结构、化学稳定性和介电性能的影响。傅里叶变换红外光谱(FTIR)结果表明,随着SiO_2/B_2O_3比的增大,玻璃网络结构中桥氧增多,非桥氧减少。镁铝硼硅酸盐玻璃的耐酸侵蚀能力随SiO_2/B_2O_3比的增大而增强,而耐碱侵蚀的能力则变差。随SiO_2/B_2O_3比的增大介电常数逐渐增大。当SiO_2/B_2O_3摩尔比为2.08时,玻璃具有最小的介电常数值4.9。SiO_2/B_2O_3比为3.11时,玻璃的介电损耗出现最小值。

Effect of SiO2/B2O3 Ratio on Structure,Chemical Durability and Dielectric Properties of Magnesium Aluminum Borosilicate Glasses

Magnesium aluminum borosilicate glasses were prepared by melting-quenching method.The effect of SiO2/B2O3 ratio on structure,chemical durability and dielectric properties of magnesium aluminum borosilicate glasses has been investigated.The Fourier transform infrared spectroscopy (FTIR) revealed that when SiO2/B2O3 ratio increased,the bridge oxide (BO) in the glass network increased,but the non-bridge oxide (NBO) decreased.When SiO/B2O3 ratio increased,the acid resistance of the magnesium aluminum borosilicate glasses improved,while the alkali resistance deteriorated.The dielectric constant increased with increase of SiO2/B2O3 ratio.When SiO/B2O3 ratio reached to 2.08,the minimum dielectric constant value 4.94 in this investigation was achieved.When SiO2/B2O3 ratio was 3.11,the dielectric loss value reached the minimum.