Abstract
The Mg2TiO4-xwt% LiF–2CaF2–2B2O3 (LCB, 3.0 ≤ x ≤ 10.0) ceramics were fabricated to study the relationship among LCB additive and the sintering behavior, phase composition, micro-structure and dielectric performance of ceramics in this study. The sintered ceramics are mainly Mg2TiO4 phase, accompanied by small amount of second phase CaTiO3 and Mg3B2O6. They are generated from the chemical reaction of CaF2 and B2O3 with the matrix material, respectively. Appropriate LCB additive significantly enhanced sintering ability and dielectric performance of Mg2TiO4-based ceramics. Sintered at 1175 °C, Mg2TiO4-7.5 wt% LCB ceramics exhibited a dielectric performance: εr of 15.3, Q × f of 32 950 GHz and τf of +1.96 ppm/°C, which is expected to be an alternative material for communication component.
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