New inorganic binders for room temperature fabrication of upside-down SrTiO3-based ceramic composites

Abstract

Abstract

In this study, inorganic binders are prepared and successfully applied as alternatives to Li2MoO4 for room-temperature fabrication of binder–SrTiO3 composites. The inorganic compounds Na2MoO4, Na2WO4, Na2SiO3, and MgSO4, were used as binding phases (15 vol%) in the room-temperature fabricated composite systems, resulting in pellets with relative density (ρ = 83–88 %) and dielectric properties applicable in radio and microwave (MW) frequency ranges. The relative permittivity values of the as-prepared binder–SrTiO3 composites varied from 68–124 at 1 MHz and between 67–129 in the MW frequency range. The dielectric losses exhibited a range of 0.0029–0.0142 at 1 MHz, with corresponding Q × f values ranging from 689–1335 GHz. The microstructure, binder–SrTiO3 interactions, and thermal behavior of the binders and composites were studied using SEM, XRD, and TG analysis. This study provides valuable insights into the use of inorganic binders to fabricate binder–SrTiO3 composite systems, which could have significant implications in various fields, including electronics and telecommunications, owing to their enhanced properties.