Abstract
In the current study, LiF as a sintering agent was chosen to achieve the low temperature sintering of Li2Mg3Ti0.95(Mg1/3Sb2/3)0.05O6 (LMTS) ceramics. LMTS ceramics with 1–4 wt.% LiF additions were prepared by a solid-state reaction. The influence of LiF-doping on x-ray diffraction patterns, apparent density, micro-morphology and microwave dielectric properties were discussed in depth. With different LiF additions, LMTS ceramics show a rock salt structured pure phase. A small amount of LiF addition can significantly promote sintering due to the liquid-phase sintering. Compact samples (> 95% of theoretical density) can be obtained at 950°C for LMTS with 2–4 wt.% LiF addition ceramics. Particularly, LMTS with 4 wt.% LiF additional ceramic exhibited optimal microwave dielectric properties at 950°C (er = 14.9, Q × f=68132 GHz and τf = − 39.24 ppm/°C). Moreover, LMTS ceramics possessed excellent chemical compatibility with silver, implying that the LMTS-LiF ceramic is a potential candidate for low temperature co-fired ceramic (LTCC).
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