Abstract
In this study, LiNb0.6Ti0.5O3 (LNT) ceramics with x wt.% (0 ≤ x ≤ 2.0) of added Li2O–B2O3–SiO2–CaO–Al2O3 (LBSCA) glass were prepared by conventional solid-state reaction method. Effects of LBSCA glass on phase composition, microstructure, lattice vibration, and microwave dielectric properties of the LNT-x wt.% LBSCA ceramics were investigated. X-ray diffraction analysis confirmed the formation of single-phase Li1.075Nb0.625Ti0.45O3 in all samples. Combined with Raman spectroscopy, it was suggested that the microwave dielectric properties were highly associated with the bulk density, the vibration damping behavior, the Nb–O bond strength, and the degree of order in crystal structure. Introduction of LBSCA glass resulted in effective decrease in the sintering temperature to 925 °C and contributed to the improvement of quality factor (Q × f) value. The LNT-0.4 wt% LBSCA sample sintered at 925 °C exhibited excellent microwave dielectric properties with ϵr = 62.9, Q × f = 7561 GHz, and τf = 12.56 ppm/°C coupled with good chemical compatibility with silver), which offers good application prospects in the field of low-temperature co-fired ceramic technology.
Published Version
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