Trace additive enhances microwave dielectric performance significantly to facilitate 5G communications

Abstract

AbstractThe ZnZrNb2O8 + x wt% LiF, MgF2, CuO (0.00 ≤ x ≤ 0.10), and Zn1−xCuxZrNb2O8 (0.000 ≤ x ≤ 0.050) ceramics were synthesized through solid‐state reaction. Compared with pure ZnZrNb2O8 ceramic, the quality factor and microstructure densification of the specimens with the addition of trace additives were significantly improved. When CuO was utilized as a sintering additive, is mostly impacted by relative density, whereas Q f value is primarily influenced by grain size. When CuO was employed as a dopant, is strongly connected to the dielectric polarizability and lattice vibration, Q f value is driven mostly by chemical bond covalency, and value is primarily dictated by variations in Nb–O bond energy and bond valence. Notably, the ceramics demonstrated excellent characteristics ( = 27.404, Q f = 74 213 GHz, = −52.779 ppm/°C, ZnZrNb2O8 + 0.06 wt% CuO; = 27.448, Q f = 72 520 GHz, = −53.143 ppm/°C,Zn0.997Cu0.003ZrNb2O8), and these make them promising for use in fifth generation communications.