LAUSR

Abstract[Mg1 − x(Li0.5Bi0.5)x]2SiO4 (MLBS, 0 ≤ x ≤ 0.06) ceramics were fabricated via a conventional solid-state reaction method. The X-ray diffraction showed that a single forsterite phase was formed while the sintering temperature of MLBS ceramics was lowed. The (1 − y)[Mg0.98(Li0.5Bi0.5)0.02]2SiO4–yCa0.8Sm0.4/3TiO3 (MLBS2-CST, 0.05 ≤ y ≤ 0.2) composite ceramics added with 4 wt% LiF were well sintered from 850 to 950 °C. With increasing Ca0.8Sm0.4/3TiO3 composition (y), τf values increased from negative to positive. The 0.85MLBS2-0.15CST-4 wt% LiF composite ceramics sintered at 875 °C exhibited excellent microwave dielectric properties of εr = 11.9, Q × f = 12,000 GHz, and τf = 4.9 ppm/°C. Such sample was compatible with Ag electrodes, which indicates the ceramic is a promising material for LTCC application.