Preparation and Properties of Ba6-3xEu8+2xTi18O54 Ceramics via Ethylenediaminetetraacetic Acid Precursor

Ba_6-3xEu_8+2xTi₁₈O₅₄ (x=2/3) (BET) ceramic powders were synthesized by the Pechini method using ethyl-enediaminetetraacetic acid (EDTA) as a chelating agent. A milk-white, molecular-level, homogeneously mixed gel was prepared, and transferred into a porous resin intermediate through charring. Single-phase and well-crystallized BET ceramic powders were prepared by sintering and smashing ceramics samples, without the formation of any intermediate phases. Meanwhile, the crystal structure, which was determined by X-ray diffraction, had important effect on the microwave dielectric properties of BET. The BET ceramics had good microwave dielectric characteristics: ɛ_r = 72.13, Q_f = 7111 GHz, τ_f = −36.53 × 10⁻⁶/°C.