Effect of Co-substitution on microwave dielectric properties of Li 3 (Mg 1−x Co x ) 2 NbO 6 (0.00 ≤  x  ≤ 0.10) ceramics

Crystal structure and enhanced microwave dielectric properties of Ta5+ substituted Li3Mg2NbO6 ceramics

“…According to previous studies, τ f values of Li 3 Mg 2 NbO 6 ceramics can be tuned to near‐zero by employing limited substitutions . In the present study, a near‐zero τ f was obtained for the composition having x = 0.02.…”

“…According to previous studies, τ f values of Li 3 Mg 2 NbO 6 ceramics can be tuned to near-zero by employing limited substitutions. 30,31 In the present study, a near-zero τ f was obtained for the composition having x = 0.02. Additionally, the Q × f values first increase, reaching a maximum for x = 0.03, and then decrease, which indicates that a higher Ta 5+ substitution content of x > 0.04 does not exhibit any significant contribution to improving Q × f values.…”

Usage of P–V–L bond theory in studying the structural/property regulation of microwave dielectric ceramics: a review

“…The Mg site can usually be replaced with Mn 2+ , Ca 2+ , Zn 2+ , Ni 2+ , and Co 2+ ions. [143][144][145][146][147] Tetravalent Ti 4+ and pentavalent V 5+ , Sb 5+ , Ta 5+ , and hexavalent W 6+ ions are reported to substitute for Nb sites. [148][149][150][151][152][153][154] For instance, a Ta 5+ ion replaces an Nb site in Li 3 Mg 2 Nb 1−x Ta x O 6 (x = 0-0.04) system leading to a decrease in cell volume, and the ε r value increases along with the x value owing to the enhancement in dielectric polarizability.…”

Crystal structure, densification, and microwave dielectric properties of Li3Mg2(Nb(1−x)Mox)O6+x/2 (0 ≤ x ≤ 0.08) ceramics

“…In fact, M. Castellanos et al had successfully synthesized Li 3 Mg 2 NbO 6 powders by solid‐state reaction in 1982, and the lattice parameters of obtained Li 3 Mg 2 NbO 6 powders were a = 8.552 Å, b = 5.897 Å, c = 17.721 Å. According to previous studies, the substitution of divalent ions (Zn 2+ , Ca 2+ , Ni 2+ , Co 2+ , Mn 2+ ) at Mg‐site of rock salt structured Li 3 Mg 2 NbO 6 ceramics have obviously improved the microwave dielectric properties, so did the substitution of pentavalent ions (Sb 5+ , V 5+ ) at Nb‐site . The improvement mentioned above might be related to the differences in the bond between cations and anions in different oxygen octahedrons.…”