Abstract
This paper reports an investigation of the low-temperature sintering behaviors, microstructures, and microwave dielectric properties of Li1.0Nb0.6Ti0.5O3 (LNT) ceramics fired with addition of different amounts of Li2O-B2O3-SiO2 (LBS) glass. The results suggest that addition of LBS glass can effectively reduce the sintering temperature of LNT ceramic from 1100°C to 900°C without detriment of its microwave dielectric properties. However, addition of excess LBS glass leads to rapid grain growth and therefore decreases the density and microwave dielectric properties of the LNT ceramic. Optimized specimens with 1.0 wt.% LBS glass sintered at 900°C possessed excellent microwave dielectric properties of er ≈ 66.17, Q × f ≈ 5170 GHz (f = 4.32 GHz), and τf ≈ 19.2 ppm/°C.
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