Crystallization And Dielectric Properties Of Sro-Bao-Nb205-Si02 Tungsten-Bronze Glass-Ceramics

The crystallization and dielectric properties of SrO-BaO-Nb205-Si02 glass-ceramics have been investigated. Glass-ceramics that contain strontium barium niobate (SBN) as a primary crystalline phase, which has a tungsten bronze structure, are produced. The formation of crystalline secondary phases has also been studied, together with the dendritic morphology of the SBN crystals. The SBN content and composite dielectric constant each has been studied as a function of heating temperature/time. The highest SBN content and dielectric constant obtained in this study are 42 vol% and 180, respectively. The dielectric constant of the glass-ceramic is determined primarily by the SBN content and the residual glass phase.