Characterization of the low temperature firing BaO–B2O3–SiO2 glass: The effect of BaO content

In the low temperature sinterable glass system of BaO–B2O3–SiO2, the structural changes of the glasses and the resultant changes in the properties of the glasses were examined as a function of BaO content. 11B MAS-NMR analysis was conducted in order to examine the coordination number of borons in the glass. It showed that the amount of O4 was greatest at 35 mol% of BaO. The glass transition temperature, hardness, thermal expansion coefficient and dielectric constant of the glasses were examined and the results were explained on the basis of the structural change.