Microstructure and Microwave Properties of Complex Perovskite-Structured Ba(Zn1/3Nb2/3)O3 Ceramics and Dielectric Resonator Antenna by Digital Light Processing Technology

Complex perovskite-structured Ba(Zn 1/3 Nb 2/3 )O 3 (BZN) ceramics with high B-site 1:2 ordering degree and excellent dielectric properties were successfully fabricated using digital light processing (DLP). BZN ceramic slurry with 82   wt. % solid loading, low viscosity, and high curing properties was used to prepare green bodies. The samples were exposed to debinding process in vacuum and then sintered at 1350–1450 ℃ for 4   h. The as-sintered BZN ceramics with disordered B-site structure exhibited significantly low dielectric properties. However, the BZN ceramics annealed at 1300 ℃ for 24   h with high B-site 1:2 ordering degree exhibited excellent dielectric properties ( ε r = 38.9, Q × f = 89,600   GHz, and τ f = 22 ppm/℃) that were identical to those of dry-pressed ceramics. Furthermore, a DLP-fabricated cylindrical BZN dielectric resonator antenna exhibited a >90% radiation efficiency and resonant frequency of 7.10   GHz ( S 11 = -29.94   dB), which is consistent with the simulation results.