The Ba [Mg13 (Nbx4 Ta (4-x) 4) 23] O3 ceramics (x=0, 1, 2, 3, and 4) synthesized by a solid reaction method were sintered at 1650 °C for 9 h. The quality factor (Q,∼1tan δ,tan δ: dielectric loss) and superlattice structure were investigated by the cavity method and high-resolution electron microscopy. The excellent Q value of 17 600 obtained at appropriate Nb content (x=1). The disorder structure (superlattice modulation∼0.41 nm), 1:2 ordering structure (superlattice modulation∼0.71 nm) and antiphase domain boundary (APB) were revealed in Ba [Mg13 (Nbx4 Ta (4-x) 4) 23] O3 ceramics. The formation of extra ordering structure (superlattice modulation∼1.24 nm) on the APBs contributed to the improved Q value with the stabilization of ordering-induced domain boundaries.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)