Microwave dielectric properties of 0.6ZrO-0.4(ZnNb)O-TiO ceramics doped with LiCO, CuO or MnCO.

0.6ZrO-0.4(ZnNb)O-TiO(ZN40) microwave dielectric ceramics were prepared by conventional solid-state reaction method, and the effects of LiCO, CuO, MnCO additives doping on their microstructures, phase composition, and dielectric properties were investigated. The results shown that suitable additives didn't change the crystal phase of ZN40 ceramics, and the main crystalline phase of all the samples was orthorhombic α-PbO type ZrTiO; a moderate amount of LiCO, CuO, MnCO could not only effectively lower the sintering temperature due to form liquid-phase, or promote ion diffusion by Ti-site ionic substitution of unequal values, but also improve the quality factor ( Q × f). The optimal integrated microwave dielectric properties( ε = 42.59, Q × f = 52,500 GHz and τ = +7.8 ppm/°C) were achieved for ZN40 ceramics containing 1 wt% MnCO sintered at 1220 °C for 3 h, and which make this material a prospective candidate for use in satellite communication and mobile communication base station. [ABSTRACT FROM AUTHOR]