Compositional dependence of structure and wetting properties of CoO-doped silicate glass for porcelain enamel

Abstract

In this study, we investigated the relationship between the structural changes and wetting properties of porcelain enamel doped with CoO. Glass with the composition 45SiO₂–15B₂O₅–25NaO–15CaO was doped with different CoO concentrations. The wetting properties were characterized by high-temperature microscopy and the structural changes were observed by scanning electron microscopy, X-ray photoelectron spectroscopy, electron probe microanalysis, Fourier transform infrared spectroscopy, and energy dispersive X-ray spectroscopy. CoO addition increased the number of non-bridging oxygen atoms in the glass system, as well as the wetting ability. The addition of CoO to the porcelain enamel not only increased adherence, but also decreased the sintering temperature.