Abstract
20MO.55Bi2O3.25B2O3 (M = Sr, Ba) glasses have been prepared by conventional melt quenching method and the Bi24B2O39 (boron sillenite) crystalline phase by solid state reaction technique. The effect of variation in wt% of Bi24B2O39 crystalline phase on 20SrO.55Bi2O3.25B2O3 (SBB) and 20BaO.55Bi2O3.25B2O3 (BBB) glasses has been investigated. The sintered density of the glass samples were characterized by Archimedes' method. The X-ray Diffraction method, Fourier Transform-Infrared (FT-IR) spectra and FT- Raman spectra are used for structural investigations, whereas Scanning Electron Microscope (SEM) analysis is used for the microstructural study. The effect of the Bi24B2O39 crystalline phase as filler in the glass network is confirmed from the FT-IR and FT-Raman spectra. The dielectric properties of the selected samples, analyzed using an Impedance analyzer, show that the dielectric constant slightly increases with increase in the wt% of Bi24B2O39 crystalline phase on glasses and the BBB glasses show higher dielectric values than the SBB glasses. The glass ceramic composites show low sintering temperature (<650 °C), dielectric constant in the range 10–16 and dielectric loss of ~0.0069, suggesting that they can be used as promising candidates for Ultra Low Temperature Cofired Ceramic Applications(ULTCC).
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