Properties of yBa6−3xEu8+2xTi18O54+ (1−y) Ba6−3xSm8+2xTi18O54 ceramics via ethylenediaminetetraacetic acid precursor

yBa6−3xEu8+2xTi18O54+ (1−y)Ba6−3xSm8+2xTi18O54 (x=23, y=0.1) (BEST) ceramic powders were synthesized by the Pechini method using ethylenediaminetetraacetic acid (EDTA) as a chelating agent. A flaxen, molecular-level, homogeneously mixed gel was prepared, and transferred into a porous resin intermediate through charring. Two-phase and well-crystallized BEST powders were prepared by calcination of the resin intermediate, without formation of any intermediate phases. Meanwhile, the crystal structure was determined by X-ray diffraction, which can be used to explain the microwave dielectric properties of BEST. The BEST ceramics prepared via EDTA precursor has good microwave dielectric characteristics: εr=52.36, Qf=2850 GHz and τf=−24.56 ppm °C−1.