Effect of colloidal processing on densification and dielectric properties of Ba(Zn1/3Ta2/3)O3 Ceramics

Crystal structure dependence of the microstructure and microwave dielectric properties of (SrxCa1−x)(Zr0.95Ti0.05)O3 (0 ≤ x ≤ 1) perovskite ceramics

“…Therefore, the formation energy of the reconstructed superlattice is high, and the superlattice is only near the coherent phase interface. So the superlattice ordered structure driven by the change of regional microstructure is a short-range ordered structure, which is obviously different from the long-range ordered superlattice structure formed by the periodic ordered arrangement of B-site ions, such as Ba(Zn 1/3 Ta 2/3 )O 3 11,12 and Ba(Mg 1/3 Ta 2/3 )O 3 . 14,15 When the internal strain is too high or the ambient temperature rises, it is difficult to maintain the superlattice ordered structure, and the structure will be changed to a more stable cubic phase structure.…”

“…Among them, the intermediate dielectric constant ceramics are mainly used in microwave mobile communication and modern radar, which have high market demand. 9 The representative microwave dielectric ceramics include (Zr 0.8 Sn 0.2 )TiO 4 ( ε r = 38, Q × f = 7000 GHz, τ f = 0 ppm °C −1 ), 10 Ba(Zn 1/3 Ta 2/3 )O 3 ( ε r = 28.2, Q × f = 121 600 GHz, τ f = 5.31 ppm °C −1 ), 11–13 and Ba(Mg 1/3 Ta 2/3 )O 3 ( ε r = 24, Q × f = 165 800 GHz, τ f = 0.12 ppm °C −1 ). 14,15 However, the low quality factor or a high raw material cost limit their application.…”