Series of thermally stable Li1+2x Mg4-x V3O12 ceramics: low temperature sintering characteristic, crystal structure and microwave dielectric properties

Series of novel low-firing microwave dielectric ceramics with the composition of Li1+2x Mg4-x V3O12 (-0.2 a parts per thousand currency sign x a parts per thousand currency sign 0.1) were prepared by a solid-state reaction process. The crystal structure, sintering behavior and microwave dielectric properties of ceramics were investigated using X-ray diffraction, scanning electron microscopy and dielectric measurement. As x increased from -0.2 to 0.1, the optimized sintering temperature was reduced from 880 to 700 A degrees C, the quality factors (Q x f) were effectively enhanced from 21,000 to 33,200 GHz. A good combined microwave dielectric properties with epsilon(r) = 12.1, Q x f = 21,800 GHz, tau (f) = 1.8 ppm/A degrees C were obtained for x = -0.1.