B/C site modified Li3Mg2NbO6 dielectric properties for microwave application

The modified Li3+xMg2-xZnxNb1-xTixO6 ceramics were fabricated through a conventional solid-state reaction method. The charge compensation of Zn2+ ions substitution into Mg2+ site and Ti4+ ions substitution into Nb5+ site of Li3Mg2NbO6 ceramics were performed by introducing lithium ions. XRD patterns analysis and Rietveld refinements verified that Li(3+x)Mg(2-x)Zn(x)Nb(1-x)TixO(6) ceramics displayed an orthorhombic structure accompany with a little of impure phase. B/C site modification improved dielectric properties. An optimal dielectric properties of epsilon(r) = 16.3, Qxf = 93,100 GHz, and tau(f) = -34.1 ppm/degrees C were acquired for Li3.04Mg1.96Zn0.04Nb0.96Ti0.04O6 ceramics, which heralds their microwave application potential. (C) 2022 Elsevier B.V. All rights reserved.