Abstract
Rock salt structured Li4WO5 ceramics were prepared by the reaction sintering method. Without calcination, a mixture of Li2CO3 and WO3 were sintered directly. XRD shows that a single orthorhombic Li4WO5 phase was obtained throughout the sintering temperature range 870–910 °C. Dense ceramic with a high relative density ~ 94.2% was achieved through reaction sintering at 880 °C. Excellent microwave properties with e r = 9.1, Q × f = 43,000 GHz, and τ f = − 3 ppm/°C were obtained. In contrast with the conventionally sintered ceramics, it should be noted that the reaction sintered samples have a higher permittivity and quality factor. These results show that the reaction sintering can enhance the densification of Li4WO5, which in turn would improve the dielectric performances.
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