Microwave dielectric properties of BaO–Ta2O5–TiO2 system

Improved Microwave Dielectric Properties of Ba6Ti1−xSnxNb4O18 Ceramics

“…The dielectric losses fall into two categories: extrinsic and intrinsic. Many previous reports have shown that the Sn substitution for Ti is effective in improving the quality factor 10,12 . And the densities of these ceramics are >95% of their theoretical density; extrinsic losses from porosity and second phases might be neglected.…”

“…Previous work suggested that the substitution of Sn could improve the properties of microwave dielectric ceramics 10–13 . Yokoi et al 12 reported in a Ba 10 Ta 7.04 (Ti 1.2− x Sn x )O 30 system that the Q × f value was enhanced effectively and the τ f value became smaller on partial substitution of Sn for Ti. A similar feature was also found by Choi et al 13 in a 0.75(Al 1/2 Ta 1/2 )O 2 –0.25(Ti 1− x Sn x )O 2 system, and τ f values within ±10 ppm/°C were realized for the Sn content below 30 mol%.…”

BaTa2V2O11: A novel low fired microwave dielectric ceramic

“…Up to now, numerous Ta-based compounds with excellent microwave dielectric properties have been reported [10][11][12][13][14]. For example, Ba 8 ZnTa 6 O 24 ceramics have been proved to be an excellent dielectric material with ε r of 30.…”

Microwave dielectric properties and sintering behaviors of (Mg0.95Ni0.05)TiO3–CaTiO3 ceramic system

“…Low dielectric loss, on the other hand, would play a more prominent role instead. For instance, low loss dielectrics with dielectric constants in the 20 s have become most popular materials used for today's GPS patch antennas, Wireless LAN and 5.8 GHz ISM band filters [1,2]. Still, zero f remains as one of the primary requirements for high frequency materials and becomes more and more critical as the operating frequency going higher.…”