Symmetry of hexagonal ring and microwave dielectric properties of (Mg1−xLnx)2Al4Si5O18+x (Ln=La, Sm) cordierite-type ceramics

Lattice dynamics and phonon characteristics of complex perovskite microwave ceramics

“…1, pp. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) the complex nature of the atoms in the B-site promotes the splitting of the vibrational modes, leading to a more complicated IR spectrum.…”

Crystal structure, phonon modes, and bond characteristics of AgPb2B2V3O12 (B = Mg, Zn) microwave ceramics

“…Literature provides many dielectric materials with excellent microwave properties, which include Li 2 O, TeO 2 , MoO 3 , P 2 O 5 , and Bi 2 O 3 ‐rich compounds and silicate ceramic materials such as Zn 2 SiO 4 , Al 2 SiO 5 , Mg 2 SiO 4 , Sr 2 Al 2 SiO 7 , etc . Even though Si‐ and Al‐containing compounds show better dielectric properties, their high sintering temperature (>1300°C) preclude their applications in microwave circuits.…”

Controllable τf value of barium silicate microwave dielectric ceramics with different Ba/Si ratios

“…Low‐permittivity (ε r < 15) silicate microwave dielectric ceramics such as M 2 SiO 4 ( M = Ba, Zn, Mg, Co, and Ni), (Sr 1‐ x A x ) 2 (Zn 1‐ x B x )Si 2 O 7 ( A = Ca, Ba and B = Co, Mg, Mn, Ni), M Al 2 Si 2 O 8 ( M = Ba, Sr, and Ca), Mg 2 Al 4 Si 5 O 18 , Sr 2 Al 2 SiO 7 , and LiRe 9 (SiO 4 ) 6 O 2 (Re = rare earth elements), have attracted considerable scientific attention because they can be used for various applications, such as high‐frequency substrates, wave‐transparent windows, dielectric antennas, high‐accuracy capacitors, and millimeter‐wave components. Low‐permittivity can reduce reflection at the interface between air and dielectrics, minimize cross‐coupling with conductors, and shorten the time for electronic signal transition .…”