Abstract
This research demonstrates the microwave dielectric properties of Ba2Bi2/3TeO6 ceramics, synthesized for the first time via the solid-state method, for LTCC applications. The analysis of X-ray diffraction (XRD) patterns and structural refinement verify the double perovskite structure of Ba2Bi2/3TeO6 ceramics. Transmission electron microscopy (TEM) validates the ordered layered structure of the double perovskite Ba2Bi2/3TeO6 ceramics. Scanning electron microscopy (SEM) characterizes the grain microstructure, revealing a relative density of 99.1% for the sample. An inverse proportionality is observed between the Raman full-width at half maximum (FWHM) and the Q × f value. X-ray photoelectron spectroscopy (XPS) elucidates the chemical composition and valence states of the Ba2Bi2/3TeO6 ceramic elements. The microwave dielectric properties of Ba2Bi2/3TeO6 ceramics calcined at 935 °C were discovered to be εr = 11.94, Q × f = 21,579 GHz (f = 9.8 GHz), and τf = −22.4 ppm/°C. Ba2Bi2/3TeO6 ceramics emerge as an excellent candidate for LTCC applications.
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