Selection of optimum composition of aluminoborosilicate glasses with excellent dielectric properties according to orthogonal experiment design

Abstract

In order to obtain excellent dielectric properties, the orthogonal experiments were carried out to determine the optimum content of Al2O3, SiO2 and B2O3 in the aluminoborosilicate glasses. During the orthogonal experiment, the range analysis was used to analyze factors intuitively. The samples were prepared by conventional melt quenching method. FT-IR, DSC and Impedance instrument were carried out to investigate structure, thermal property and dielectric property, respectively. The results showed that the glass transition temperature (Tg) and the glass crystallization temperature (Tc) increased with the increase of Al2O3, SiO2 while decreased with B2O3. The structure of glasses would become more compact with the content of Al2O3 and SiO2 increasing, while B2O3 loosed the structure. The better polymerization structure could be obtained when the glass samples contained 12 mol% Al2O3; 58 mol% SiO2 and 18 mol% B2O3. The increase of SiO2 improved the dielectric properties while Al2O3 had passive effect. Besides, with the increase of B2O3 content from 18 to 22 mol%, the dielectric constant and dielectric loss decreased firstly and then increased. The optimum composition of the glass samples with excellent dielectric properties could be determined as the follows: 8 mol% Al2O3; 20 mol% B2O3 and 58 mol% SiO2.