Microwave dielectric properties of Eu4Ti3O12 ceramics via sol-gel method

Ceramic powders with chemical formula Eu4Ti3O12 were fabricated by sol-gel method. A milk-white homogeneously mixed gel was prepared, and transferred into a porous resin intermediate through charring. Eu4Ti3O12 powders were prepared by calcination of the resin intermediate, and ceramic samples with two phases of Eu2TiO5 and Eu2Ti2O7 were got by sintering. Meanwhile, the crystal structure was determined by X-ray diffraction and grain character was analyzed by scanning electron microscope. Eu4Ti3O12 ceramics has good microwave dielectric characteristics: epsilon(r) = 27.51, Q(f) = 9450 GHz, tau(f) = 211 ppm/degrees C.