Abstract
New temperature stable 4 wt% LiF-doped (1-x)Li2Mg3TiO6-xSrTiO3 (LMT-ST, x = 0.05, 0.08, 0.10, 0.15) composite ceramics were fabricated by solid-state reaction for low-temperature co-fired ceramics (LTCC) applications. Well-densified LMT-ST composite ceramics were obtained with a relative density of 97.2% at 900 °C. A near zero of τf value was obtained by tuning ST composition. 0.9LMT-0.1ST-4wt% LiF ceramics displayed optimum microwave dielectric properties: εr = 19.5, Q×f = 64290 GHz, τf = 6.5 ppm/°C at 900 °C. Such samples were compatible with Ag electrodes, which suggests suitability of the developed material for LTCC applications in wireless communication systems.
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