Abstract
A series of dense ceramic samples in the (1 − x)BiVO4–xLi0.5Re0.5WO4 (Re = La, Nd; 0.05 ≤ x≤0.11) has been prepared by using the traditional solid state reaction method. A single solid solution phase with monoclinic structure is formed through the entire compositions and the unit cell volume increases linearly with x. When x = 0.09, the composition of 0.91BiVO4–0.09 Li0.5La0.5WO4 readily sintered at 750 °C shows good microwave properties with er of 76.7, Q × f of 6789 GHz and τ f of 7.3 ppm/°C. As x = 0.08, the 0.92BiVO4–0.08Li0.5Nd0.5WO4 ceramic sintered at 750 °C possesses excellent microwave dielectric properties of er = 71.8, Q × f = 7482 GHz and τ f = 0.8 ppm/°C. These ceramics have applications for microwave devices requiring high permittivity and ultra-low sintering temperature.
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