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摘要
(1 - x)Li3Mg2SbO6-xBa(3)(VO4)(2) (0.0 <= x <= 0.20, LMS-BV) composite ceramics were prepared via a conventional solid-state reaction method. The microstructure and microwave dielectric properties were investigated. Li3Mg2SbO6 and Ba-3(VO4)(2) phases coexisted well in the range of 0.1 <= x <= 0.20. Adding Ba-3(VO4)(2) to Li3Mg2SbO6 not only inhibited the fragility but also improved the thermal stability of Li3Mg2SbO6-based ceramics. With the increase of x value, the epsilon(r) and tau(f) values of (1 - x)LMS-xBV composite ceramics gradually increased, while its Qxf value declined. Typically, the 0.9LMS-0.1BV composite ceramics sintered at 1200 A degrees C for 5 h demonstrated good microwave dielectric properties: epsilon(r) = 10.9, Qxf = 45,100 GHz (at similar to 10.4 GHz), tau(f) = 2.4 ppm/A degrees C.
