Journal of Materials Science: Materials in Electronics - A series of Ga3+-doped Zn2GeO4 willemite ceramics, in a general formula Zn2+0.5xGe1?xGaxO4... 相似文献
Some Li+-substituted NaCa4V5O17 ceramics were designed and fabricated by the solid-state reaction method. Effects of cation doping on the sintering behavior, crystal structure, microstructure, and dielectric properties were systematically studied. As expected, Li+ substitution effectively reduced the densification temperature of NaCa4V5O17 ceramics and lower the relative permittivity (εr), but surprisingly increased the quality factor (Q×f). A composition with 20?mol% Li+ dopants exhibits the highest Q×f?=?66,000?±?124?GHz coupled with an εr of 10.4?±?0.1 and a τf of ? 81.3?±?1.4?ppm/°C. Such compositional dependence in dielectric properties was analyzed in terms of ionic polarization and packing fraction.